名词
中文翻译：茎
同义词：
['root', 'bud', 'rootstock']
例句：
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1. The stem of the plant is 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 broken off 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 where the petals meet.
花的茎是花瓣相接的地方。