名词中文翻译
中文翻译：上级树干
同义词：
['leading trunk', 'superior stem']
例句：
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1. The tree's superior trunk is visible from the top of the hill.
从山顶上可以看到这棵树的优等树干。
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2. The engineer designed the superior trunk to support the weight of the building.
工程师设计了优等树干来支撑建筑物的重量。
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3. The superior trunk of the tree was damaged during the storm.
暴风雨期间，这棵树的优等树干受损了。