1. 树干
    The trunk of a tree is the large main stem from which the branches grow.

    e.g. ...the gnarled trunk of a birch tree.
           白桦树粗糙多瘤的树干
    e.g. …toadstools growing on fallen tree trunks.
           在倒下的树干上长出的伞菌

2. 旅行箱;衣箱
    A trunk is a large, strong case or box used for storing things or for taking on a journey.

trunk什么意思

3. 象鼻
    An elephant's trunk is its very long nose that it uses to lift food and water to its mouth.

4. (汽车的)行李箱
    The trunk of a car is a covered space at the back or front in which you put luggage or other things.

5. (男式)游泳裤
    Trunks are shorts that a man wears when he goes swimming.

    e.g. I wear these trunks because they have a streamline effect in the water.
           我穿这条游泳裤因为它在水中有流线效果。

6. (人体从颈部到腰部的)躯干
    Your trunk is the central part of your body, from your neck to your waist.