zero

• 形容词，表示“没有”或“毫无”；用于指某事物不存在或数量为零。

An adjective meaning 'not any' or 'no amount of'; used to indicate the absence of something.

1. Absence of quantityA1formal

   Indicating the absence of any or all units under consideration.

   零的

   • The temperature dropped to zero degrees Celsius.
   • There is zero chance of rain today.
   • He has zero tolerance for dishonesty.

   同义词naughtnilnoughtnullzilchzip

2. No valueA2formal

   Having no measurable or otherwise determinable value.

   零值的

   • The project had zero impact on the community.
   • Her contribution was zero in the final analysis.
   • The investment yielded zero profit.

   同义词naughtnilnonenullworthlesszilch

   反义词negativepositive

3. Starting pointB1formal

   Indicating an initial point or origin.

   零点的

   • The race starts at zero meters.
   • We need to reset the counter to zero.
   • The timeline begins at year zero.

   同义词initialopeningstarting

4. C1formalscientific

   Of or relating to the null set, a set with no members.

   空集

   • The intersection of these two sets is zero.
   • In mathematics, a zero set has no elements.
   • The concept of a zero set is fundamental in set theory.

   同义词emptynullvoid

• 表示数字0的名词，指没有数量；也指数学中的加法单位元，即加任何数都不改变其值的元素，还指刻度或瞄准具的起点、零点（无风时使弹着点命中靶心的标定）。

A noun representing the cardinal number 0, indicating the absence of quantity; it also refers to a mathematical element that is the additive identity, a neutral starting point on a scale, or a sight setting for a projectile to hit the center of a target with no wind.

1. A quantity of no importanceA2informal

   Something that has no value, significance, or importance.

   微不足道的事物

   • His contribution to the project was zero.
   • The chances of winning are practically zero.
   • She felt her opinion counted for zero in the discussion.

   同义词aughtciphergoose eggnadanaughtnilnixnothingnoughtnullzilchzipzippo

   反义词consequenceimportancesignificancesomethingvalue

2. Mathematical elementA1formal

   A number that, when added to any other number, yields that same number; the additive identity.

   零

   • If you add zero to five, you still get five.
   • Zero multiplied by any number equals zero.
   • The concept of zero is fundamental in mathematics.

   同义词ciphernaughtnilnoughtnull

3. B1formal

   The point on a scale from which positive or negative numerical quantities can be measured.

   零点

   • The temperature dropped to zero degrees Celsius.
   • The scale starts at zero and goes up to one hundred.
   • Zero on the Richter scale indicates no seismic activity.

   同义词originzero point

4. Sight setting for a weaponC1formal

   The sight setting that will cause a projectile to hit the center of the target with no wind blowing.

   归零校准

   • The sniper adjusted his scope to zero before the mission.
   • Setting the rifle to zero ensures accurate shots in calm conditions.
   • He checked the zero on his weapon before the competition.

• 数词，表示没有数量或零值；也可用作名词、限定词或代词，表示“没有、毫无”。

The cardinal numeral representing the quantity of nothing, null, or absence of units; the additive identity in mathematics (any number plus zero remains unchanged); the boundary point between positive and negative numbers on the number line; a placeholder digit in positional numeral systems. Also functions as a noun (denoting the symbol, quantity, or concept of nothingness), adjective/determiner (modifying nouns to indicate null quantity), and pronoun (standing in for a null plural noun phrase).

1. Cardinal numeral: the number 0A1formal

   Used to denote a quantity of no persons or things; the integer representing null quantity in the sequence of integers; the additive identity in arithmetic (a + 0 = a); represents absence, nullity, or a starting point in counting, mathematics, and everyday usage.

   基数词：数字0

   • There are zero errors in the final report.
   • She scored zero points in the first round.
   • Zero plus any number equals that number.
   • The temperature dropped to zero degrees Celsius.
   • He had zero reasons to decline the offer.

2. Noun: the number, symbol, or concept of zeroA2formal

   A noun referring to the cardinal number zero; the numeral symbol 0; the concept of nothingness, nullity, or absence; in mathematics, the origin point on a number line or coordinate system; in sports, a score of nil or nothing.

   名词：零的数字、符号或概念

   • The number zero revolutionized mathematics and computation.
   • Write the digit as a zero, not the letter O.
   • The team was shut out, ending with a zero on the scoreboard.
   • In binary code, zero represents the off state.
   • The concept of zero was developed independently in several ancient cultures.

3. Adjective/Determiner: amounting to zeroA1formal

   Used attributively before a noun to indicate that the quantity or number of the noun is zero; modifies plural or singular countable nouns to specify null or absent quantity.

   数量为零的限定词/形容词

   • They recorded zero incidents during the safety audit.
   • We have zero tolerance for policy violations.
   • The experiment yielded zero detectable results.
   • She has zero experience in that field.
   • Zero emissions vehicles are becoming more common.

4. Pronoun: zero people or things (null plural)B1formal

   Used as a pronoun to refer to zero previously mentioned or understood persons or things; takes singular or plural verb agreement depending on context; emphasizes complete absence.

   代词：零个人或事物

   • Five hundred applied, but zero were selected for the pilot program.
   • I invited fifty guests; zero confirmed their attendance.
   • How many errors did you find? — Zero, the document is flawless.
   • Several hypotheses were tested, but zero proved statistically significant.
   • Of the samples analyzed, zero contained the target compound.

• 将仪器或设备调整到零点或基准水平的动作，也可指把注意力集中在某个特定目标或问题上。

A verb used to indicate the act of adjusting an instrument or device to a zero point or baseline, or to focus attention on a specific target or issue.

1. Adjust to zeroB2formal

   To set an instrument or device to a zero reading or baseline.

   归零

   • The technician zeroed the scale before weighing the sample.
   • Make sure to zero the pressure gauge before starting the experiment.
   • He zeroed the multimeter to ensure accurate measurements.

   同义词calibratenullresettare

2. Adjust a gun's aimC1formal

   To adjust the sights of a firearm so that the point of aim matches the point of impact at a specific distance.

   校枪

   • The sniper zeroed his rifle at the shooting range.
   • Before the hunt, he zeroed the scope on his rifle.
   • The soldier zeroed the weapon to ensure accuracy in the field.

   同义词calibratezero in

短语动词变体zero in