名词
中文翻译：树干
同义词：
['trunk', 'main trunk', "stem例句：1. The tree's trunk is thick and sturdy.（这棵树的树干又厚又结实。）"]
例句：
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1. The tree's trunk is thick and sturdy.
这棵树的树干又厚又结实。
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2. The trunk of the tree is where all the branches grow from.
树的主干是所有枝条生长的地方。
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3.The trunk of the tree was badly damaged in the storm.
暴风雨严重损坏了这棵树的主干。