名词
中文翻译：Unknown
同义词：
['flaw', 'crack', 'fissure']
例句：
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1.The old lady's tooth was so weak that she couldn't bite into a sandwich.
这位老太太的牙齿太弱了，连三明治都咬不动。
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2.The car had a flaw in the engine that caused it to stall frequently.
这辆车发动机有缺陷，经常熄火。
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3. He noticed a small crack in the wall and decided to repair it before it became a bigger problem.
他注意到墙上有个小裂缝，决定在它变大之前先修好。