fast

• 形容速度快、迅速，或指做某事很快发生或完成。也可指钟表走得准或偏快。

Describes something that moves or happens at high speed.

1. Moving quicklyA1formal

   Capable of moving or acting at high speed.

   快

   • The car is very fast.
   • She is a fast runner.
   • We need a fast response to this emergency.

   同义词briskfleethastynippyquickrapidspeedyswift

   反义词slowslow-moving

2. Taking a short timeA1formal

   Done or happening in a short period of time.

   快速的

   • This is a fast process.
   • He took a fast shower before leaving.
   • The internet connection is fast here.

   同义词briskexpeditiouspromptquickrapidspeedyswift

   反义词graduallengthyprolongedslowsluggish

3. Firmly fixedB2formal

   Attached or secured in a way that is not easily moved.

   固定牢靠的

   • The rope is fast to the post.
   • Make sure the door is fast before the storm.
   • The anchor held fast in the sand.

   同义词attachedboundfirmfixedsecuretiedtight

   反义词detachedfreelooseunfixed

• 副词，意为“快速地”或“以高速地”，用于描述动作以很快的速度进行。该词与形容词同形，不加 -ly。

An adverb meaning "quickly" or "at high speed." It is used to describe the manner of an action performed with great speed. The form is identical to the adjective and does not take the -ly ending.

1. At high speedA1formal

   Moving or operating at a high speed; quickly.

   高速地

   • He ran fast to catch the bus.
   • The car drove fast down the highway.
   • She types fast on the keyboard.

   同义词apacebrisklyquicklyrapidlyspeedilyswiftly

   反义词graduallyslowslowly

2. Firmly or securelyB2formal

   In a way that is firmly fixed or attached.

   牢牢地

   • The door was stuck fast and wouldn't open.
   • The anchor held fast in the storm.
   • She held fast to her beliefs despite criticism.

   同义词firmlyimmovablysecurelysolidlytightly

• 名词，指一段时间内禁食或节制饮食的行为，常出于宗教或健康原因。

A noun referring to a period of time during which a person abstains from all or some kinds of food or drink, often for religious or health reasons.

1. Period of abstaining from foodB1formal

   A period during which a person does not eat food, often for religious or health reasons.

   禁食

   • Muslims observe a fast during the month of Ramadan.
   • She went on a three-day fast to cleanse her body.
   • The doctor recommended a short fast before the medical test.

   同义词abstinencedietfastingself-denialstarvation

   反义词feast

• 动词，指为了宗教、健康或仪式等原因而禁食或节制饮食。

A verb used to indicate the act of abstaining from food or eating, typically for religious, health, or ritual reasons.

1. Abstain from foodB2formal

   To voluntarily refrain from eating food, often for religious, health, or spiritual reasons.

   禁食

   • Many people fast during Ramadan.
   • She decided to fast for 24 hours as a detox.
   • The patient was asked to fast before the blood test.

   同义词abstaindietstarve