名词
中文翻译：茎
同义词：
['root', 'trunk', 'husk']
例句：
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1. The stem of the plantis green and covered in leaves.
这植物的茎是绿色的，上面长满了叶子。
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2. The stem of the tree was brokenoff by a strong gust of wind.
一阵强风把树的茎折断了。
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3. The stem of the flower is hollowand filled with air.
花的茎是空心的，里面充满了空气。