first-out alarm and signal systems 第一原因信号报警系统
First you knock the alarm clock off the dresser, then you spill the milk as you're pouring your cereal, then you stub your toe on the way out the door — you've become a klutz overnight.
先是把梳妆台的闹钟打翻了,然后在倒麦片的时候把牛奶撒出来,然后脚趾又撞到了门上——一夜之间你变成了个十足的笨蛋了。
If a fire breaks out, first break the glass to sound the fire alarm, then dial 119 and report where the fire is.
如果发生火灾,首先打破玻璃,弄响报警器,然后拨119,报告火灾发生的地点。
第一原因报警系统。
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