名词
中文翻译：按钮
同义词：
['knob', 'buttonhole', 'fastener']
例句：
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1.The buttons on the shirt are all in the right places.
衬衫上的纽扣都放对了位置。
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2.She carefully buttoned up her coat.
她小心翼翼地扣上了外套的扣子。
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3. He tried to button his shirt but it wouldn't stay closed.
他试图扣上他的衬衫，但衬衫始终关不上。