If a short circuit occurs the current will rise rapidly through these switches and when it reaches a predetermined trip level, both devices turn off simultaneously.
如果出现短路电流将迅速上升，通过这些开关，当它到达预定的访问级别，这两种设备同时关闭。
Simultaneously, due to the scarcity of urban land, more and more high-rise buildings, underground space's development and utilization become an important way to try and ease congestion in the city.
同时，由于城市土地资源的稀缺，高层建筑越来越多，地下空间的开发利用成为解决城市拥挤问题的重要途径。
Simultaneously, due to the scarcity of urban land, more and more high-rise buildings, underground space's development and utilization become an important way to try and ease congestion in the city.
同时，由于城市土地资源的稀缺，高层建筑越来越多，地下空间的开发利用成为解决城市拥挤问题的重要途径。
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