Loading all of the stored objects could be an overhead for no particular reason.(没有特殊原因，装入所有的存储对象是一种开销。)
A number of birds are circling overhead.(很多鸟在头顶上空盘旋。)
Thunder crashed overhead.(头顶上雷声隆隆。)
Wendy was now almost overhead, and they could hear her plaintive cry.(温迪现在几乎就在头顶上了，他们听得见她哀怨的哭声。)
Prairie dogs may be able to tell you about a hawk that's circling overhead right now, but they never show any inclination to describe the one they saw last week.(草原土拨鼠也许能告诉你现在有一只鹰在头顶盘旋，但从未表现出任何意愿去描述上周看到的鹰。)
Thunder exploded overhead.(雷声在头顶上炸开。)
Overhead cranes were lifting giant sheets of steel.(高架起重机正吊起一块块巨大的钢材。)
Overhead, the lights showed the old timbers, used to brace the roof.(在头顶上，光线照射出支撑屋顶的旧木头。)
As you've seen, there might be ways of reducing the overhead in each case.(正如您已经看到的，在每种情况下都有减少开销的方法。)
