If a short circuit occurs the current will rise rapidly through these switches and when it reaches a predetermined triplevel, 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。
2
The research controlled for differences among the vacationers and those who hadn’t taken a trip, including income level, stress and education.
The northbound geese typically made the trip from sea level over mountain passes of up to 6000 meters in just 7 or 8 hours at speeds of 64.5 kilometers per hour.