The video was shot through a fence at some distance, but magnified still images appeared to show the aircraft with its nosewheel clearly off the ground and its parachutes deployed.
这个视频是远距离从一个栅栏之后拍摄的,但是放大之后似乎显示飞机头部机轮明显离开地面,后面装备了降落伞。
Some of these systems use radar to keep a car at a set distance from the one in front.
有些这种系统使用雷达让车子和前面的车子保持一定的车距。
Now choose a person you're presently close to but who is at some distance from you.
下面,选择一个虽然很亲密但是并不和你在一起的人。
And orbiting around this is a lone electron out at some distance r.
有一个单电子,在环原子核的轨道上运行。
a perfectly spherical shell dr at some distance, thickness, d r, dr we talk about it as 4 pi r squared d r, so we just multiply that by the probability density.
在某个地方的完美球型壳层,厚度,我们把它叫做4πr平方,我们仅仅是把它,乘以概率密度。
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