您要查找的是不是：
- His plan is to drop perpendiculars from each point of the curve upon two planes intersecting at right angles. 他的计划是：从曲线的每个点处作线段垂直于两个互相垂直的平面。
- Cascading down the rocks from some 30 metres high, they create a boom that reverberates for miles in the empty ravine. It is an impressive sight too, like silk curtains dropping perpendicularly down. 飞瀑从30多米高的峡谷凌空而下，空谷传响，声闻数里，绝壁的水帘，蔚为壮观。
- The wall is a little out of the perpendicular. 那墙有点斜。
- The valley ended in a perpendicular rim of granite. 那山谷的尽头是花岗石的断崖。
- He said he would drop her like a hot potato. 他说他会把她像烫手的东西一样迫不及待地扔掉。
- The rain is leaking in large drop through the roof. 雨正大滴大滴地从屋顶漏下来。
- The pillar had been restored to the perpendicular. 这柱子恢复垂直。
- Interest in the book began to drop off. 人们对这本书的兴趣开始减退了。
- The two lines are perpendicular to one another. 这两条线相互垂直。
- A drop of blood slid down his leg. 他的腿上流着一点儿血。
- Don't forget to drop by at the gas station. 别忘了到煤气站去看看。
- He drank the wine slowly, savouring every drop. 他慢慢地喝着酒，细细品尝着每滴酒的滋味。
- There are many perpendicular marble columns in Greek temples. 希腊庙宇有很多垂直的大理石柱。
- I think such customs will soon drop away. 我想这些风俗不久就会逐渐消失。
- I thought I'd drop over for a drink. 我想我要来找你喝一杯。
- Drop in and see us when you're next in London. 到伦敦时顺便来看我。
- I can drop you off at normandie ave. 我可以在诺曼蒂大街让您下车。
- He drop out because of the pressure. 由于校规很严，所以他退学了。
- She reluctantly agreed to let the matter drop. 她勉强同意这事到此为止。
- I drop off and miss the end of the film. 我打了个盹儿，把影片的结尾给错过了。
