名词
中文翻译：快门条
同义词：
['bar', 'shutter', 'switch']
例句：
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1.The photographer snapped the picture as soon as he saw the subject.
摄影师一看到主题就拍下了照片。
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2.The camera's shutter was so loud that it woke up the whole family.
相机的快门声音太大了，把全家人都吵醒了。
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3. She swung the bar to open the door.
她挥动开关打开门。