将会用到高侧（high side）和低侧（low side）开关等这些词汇。高侧意味着开关将处于工作电平（rail）电路中且实际上电流由源极流至负载，通过接地电路返回...
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中等厚度的防风林在背风侧可在20倍于树高的距离而在迎风侧则在3倍于树高的距离上减小风速10%以上。
A medium-thick shelterbelt can reduce wind velocity by more than 10 percent to a distance of 20 times the tree height on the leeward side and three times the height to the windward.
但在发射点，轨道器一面是15层楼高的外挂燃料箱，两侧是两个固体火箭助推器。
But in launch position, the orbiter is perched on the side of its 15-story external fuel tank and flanked by two solid rocket boosters.
加拿大一侧的瀑布是马蹄型瀑布，它大约有800米宽，近五十米高，它的形状像一个U字型，又称马蹄型。
It is about eight hundred meters wide and almost fifty meters high. It is shaped like the letter U, or a horse's shoe.
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