1. 捏；拧；掐；夹
    If you pinch a part of someone's body, you take a piece of their skin between your thumb and first finger and give it a short squeeze.

    e.g. She pinched his arm as hard as she could...
           她使出浑身的力气拧他的胳膊。
    e.g. We both kept pinching ourselves to prove that it wasn't all a dream.
           我们两个都一直在掐自己，证明这不是在做梦。

2. （一）撮；少量
    A pinch of an ingredient such as salt is the amount of it that you can hold between your thumb and your first finger.

    e.g. Put all the ingredients, including a pinch of salt, into a food processor.
           把包括一撮盐在内的所有配料放入食品加工机。
    e.g. ...a pinch of nutmeg.
           一撮肉豆蔻

3. 偷取，偷盗（尤指不贵重的物品）
    To pinch something, especially something of little value, means to steal it.

pinch的翻译

    e.g. Do you remember when I pinched your glasses?
           你还记得我偷你眼镜的事儿吗？
    e.g. ...pickpockets who pinched his wallet.
           偷走他钱包的扒手

4. 必要时；在紧要关头
    If you say that something is possible at a pinch, or in American English if you say that something is possible in a pinch, you mean that it would be possible if it was necessary, but it might not be very comfortable or convenient.

    e.g. Six people, and more at a pinch, could be seated comfortably at the table.
           这张桌子可以很舒服地坐6个人，而且必要时多坐几个也不会挤。

5. 感到手头拮据；感到囊中羞涩
    If a person or company is feeling the pinch, they do not have as much money as they used to, and so they cannot buy the things they would like to buy.

    e.g. Consumers are spending less and traders are feeling the pinch.
           消费者支出在减少，商人感觉手头拮据。

6. 身处困境；处境艰难
    If you are in a pinch, you are in a difficult situation.

    e.g. I'd trust her in a pinch...
           身处困境时，我信任她。
    e.g. Everyone knew he was in a pinch.
           每个人都知道他境况艰难。