1. Last summer I spent days in the garden watching thousands of ants crawling up the trunk of my prize peach tree.
    去年夏天，我花了好几天时间站在花园里观察成千只蚂蚁爬上我那棵心爱的桃树的树干。

2. In spite of all that has been said, the tourists have been picking leaves and cutting their names on the tree-trunk.
    尽管有上述种种说法，但游客们还是照常摘树叶和把他们的名字刻在树干上。

3. I had in mind a canoe, such as the natives of those regions make of the trunk of a great tree.
    我心里所想的是一叶独木小舟，就像当地土著人用大树的树干做的那种小舟一样。