1. 肢；臂；腿
    Your limbs are your arms and legs.

    e.g. She would be able to stretch out her cramped limbs and rest for a few hours.
           她将能伸展一下蜷缩的四肢，休息几个小时。

2. 树枝
    The limbs of a tree are its branches.

    e.g. This entire rickety structure was hanging from the limb of an enormous leafy tree.
           这整个快要散架的搭建物吊挂在一棵枝繁叶茂的大树的枝杈上。

3. 冒着遭受失败（或指责）的风险；处于孤立无援的境地
    If someone goes out on a limb, they do something they strongly believe in even though it is risky or extreme, and is likely to fail or be criticized by other people.

    e.g. They can see themselves going out on a limb, voting for a very controversial energy bill.
           他们可以预见到要是给极具争议性的能源法案投赞成票，可能会陷入孤立。

4. 撕裂…的肢体
    If someone threatens to tear you limb from limb, they mean that they are extremely angry with you, and may use violence against you.

    e.g. The police were lucky they found him before I did. I would have torn him limb from limb.
           警察很幸运，比我先找到了他。不然我真会把他大卸八块的。

5. to risk life and limb -> see life