1. retract

1. A cat retracts its claws.
    猫缩进它的爪子。

2. A cat can retract its claws.
    猫能缩进爪子。

1. 撤消：另一个表示所有接收该消息的盟员(RTI::MessageRetractionHandle为IEEE1516.1定义的数据类型),RTI将具有此类型的消息句柄返回给发送TSO消息的盟员保存,当发送盟员再次使用消息句柄撤消(retract)消息时,RTI从消

2. 回收：二十五年后,<科学美国>>推出了<生命起源>>特刊,并回收(retract)和纠正瓦尔特教授的文章. 为什么一个科学权威会错呢?正像他说的,只要有充分的时间,不可能错的也会错. 二十五年中,科学家懂得了细胞结构的复杂性,可能变成不可能了.

3. 公共查询·英语单词大全

3. 缩回,收回：retort 回答; 报复,回报 | retract 缩回,收回 | retreat 撤退,撤退

1. 收回，撤回(所说的话或写的东西)
    If you retract something that you have said or written, you say that you did not mean it.

    e.g. Mr Smith hurriedly sought to retract the statement, but it had just been broadcast on national radio...
           史密斯先生想赶快收回这项声明，但它刚刚已经在国家电台播出了。
    e.g. He''s hoping that if he makes me feel guilty, I''ll retract.
           他指望着如果他能让我感到内疚，我就会收回所说的话。

2. （使）缩回;（使）缩入;（使）收起
    When a part of a machine or a part of a person''s body retracts or is retracted, it moves inwards or becomes shorter.

    e.g. Torn muscles retract, and lose strength, structure, and tightness.
           撕裂的肌肉会收缩，丧失原来的力量、结构和紧实度。
    e.g. ...when the aircraft''s wheels were retracted.
           当飞机的轮子收起来的时候

1. formally reject or disavow a formerly held belief, usually under pressure

    e.g. He retracted his earlier statements about his religion
           She abjured her beliefs

    Synonym: abjurerecantforswearresile

2. pull inward or towards a center

    e.g. The pilot drew in the landing gear
           The cat retracted his claws

    Synonym: draw in

3. use a surgical instrument to hold open (the edges of a wound or an organ)

    Synonym: pull backdraw back

4. pull away from a source of disgust or fear

    Synonym: shrink back