名词
中文翻译：翅膀下
同义词：
['underside', 'underbelly']
例句：
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1.The bird's underwing is a marvel of nature.
这只鸟的翅膀下是大自然的奇迹。
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2. The pilot had to make an emergency landing under the wing of a plane.
飞行员不得不在飞机翼下紧急降落。
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3. The eagle soared low over the forest floor, its underwing barely brushing the ground.
老鹰低飞掠过森林地面，它的翼下几乎擦着地面。