名词
中文翻译：膨胀
同义词：
['bulge', 'protrusion', 'swelling', 'bulge out']
例句：
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1. The car's rear hood bulged out when it hit a pothole.
汽车后部在碰到一个坑时凸出来了。
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2. The mountain bulges out from the valley floor.
这座山从山谷底部凸了出来。
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3. The bag bulged with apples as she filled it with more.
当她往包里装苹果时，包鼓了起来。