名词
中文翻译：Unknown
同义词：
['narrow section', 'lower part', 'lower portion例句：1. The neckof the bottle is where the liquid collects.（瓶子的颈部是液体聚集的地方。）']
例句：
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1. The neckof the bottle is where the liquid collects.
瓶子的颈部是液体聚集的地方。
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2.The lower part of the tree is coveredin leaves.
树的下部长满了叶子。
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3.The lower portion of the bridge has beendamaged by the flood.
桥的下部因洪水受损。