primer

• 形容某事物质量最好、最优秀，或指最重要的、首要的。

Describes something of the best possible quality or the most important.

1. Best or most importantB1formal

   Of the highest quality, excellence, or importance.

   最好的或最重要的

   • This is a prime example of modern architecture.
   • She is in her prime years as an athlete.
   • The prime objective is to ensure safety.

   同义词bestchiefchoiceexcellentfirst-classfirst-rateforemostkeyleadingmainprincipalselectsuperiortoptop-quality

   反义词inferiormarginalminornegligiblesecondarysubordinateworst

2. First in time or orderB2formal

   Occurring first in a sequence or time.

   首要的

   • The prime cause of the accident was human error.
   • Prime numbers are divisible only by one and themselves.
   • The prime suspect was arrested last night.

   同义词firstinitialoriginalprimalprimary

   反义词finallastlatterultimate

3. Excellent conditionB1informal

   In the best possible state or condition.

   最佳状态

   • The car is in prime condition despite its age.
   • He keeps his tools in prime shape.
   • The fruit is at its prime ripeness.

   同义词choiceexcellentfirst-classfirst-ratemintoptimalpeakpremiumpristineselectsuperbtop

   反义词badinferiormediocrepoorsubstandard

• 名词，指入门的教科书或启蒙读物、用于引燃燃料的物质，或涂在表面的底漆。

A noun referring to an introductory textbook or a substance used to ignite a propellant, or a preliminary coat of paint applied to a surface.

1. Introductory textbookB2formal

   A basic textbook that introduces a subject, often used for beginners.

   入门教材

   • She bought a Latin primer to start learning the language.
   • The primer covers the fundamentals of chemistry.
   • This primer is perfect for students new to philosophy.

   同义词guidehandbookintroductionmanual

2. Igniter for propellantC1formaltechnical

   A device or substance used to initiate the burning of a propellant, such as in firearms or explosives.

   底火

   • The primer in the cartridge ignites the gunpowder.
   • He carefully replaced the primer in the explosive device.
   • A faulty primer can cause a misfire in the weapon.

   同义词capdetonatorigniterinitiatorpercussion cap

3. Preliminary coat of paintB1formaltechnical

   The first layer of paint or size applied to a surface to prepare it for the final coat.

   底漆

   • Apply a coat of primer before painting the wall.
   • The primer helps the paint adhere better to the wood.
   • He used a white primer to cover the dark spots on the ceiling.

   同义词primingundercoat