【英语时差8,16】阿瑟克拉克与静止卫星 -下

But how to do it? After all, heavy machinery¹ can’t just float. Most satellites handle this problem by being blasted into orbit around the planet. But in order to be in orbit, you have to be constantly moving. Can You Think of a Way Around This? How about putting a satellite into orbit both in the same direction as the planet rotates-and at the same speed! The result is a satellite that is, in fact, orbiting the planet. But the ground underneath² it turns at the same rate as the satellite orbits, so the satellite is always above the same spot of ground. From our perspective on the earth, a geostationary satellite seems fixed³ in one spot. Thanks, Arthur!

1 machinery   

n.(总称)机械，机器；机构

参考例句：

• Has the machinery been put up ready for the broadcast?广播器材安装完毕了吗？
• Machinery ought to be well maintained all the time.机器应该随时注意维护。

2 underneath   

adj.在...下面，在...底下；adv.在下面

参考例句：

• Working underneath the car is always a messy job.在汽车底下工作是件脏活。
• She wore a coat with a dress underneath.她穿着一件大衣，里面套着一条连衣裙。

3 fixed   

adj.固定的，不变的，准备好的；(计算机)固定的

参考例句：

• Have you two fixed on a date for the wedding yet?你们俩选定婚期了吗？
• Once the aim is fixed,we should not change it arbitrarily.目标一旦确定，我们就不应该随意改变。