名词
中文翻译：肿块
同义词：
['knot', 'lump', 'bumper']
例句：
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1. He had a hard time getting the car out of the parking lot.
他很难把车从停车场开出来。
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2. The bump on her forehead was caused by a small cut.
她额头上的肿块是由一个小伤口造成的。
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3. The bump in the road made it difficult to drive.
路上的凸起使得开车变得困难。