名词
中文翻译：触发器
同义词：
['trigger point', 'ignition source']
例句：
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1. Thedevice is designed to trigger an alarm whenit senses a disturbance.
这个设备设计成在检测到干扰时触发警报。
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2.The scientist discovered a new trigger mechanism forthe reaction.
科学家发现了一种新的反应触发机制。
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3.The trigger was set by a sudden noisein the distance.
远处突然传来的声音是触发的。