However, if you could jump up way - near the top of the atmosphere — - where the air drag is negligible — then you would be weightless for quite some time.
2
飞行过程是完全自动化的,但是如果失重令加加林情绪失控随之打乱预定程序控制该怎么办?
The flight was to be fully automatic, but what if weightlessness caused Gagarin to go mad and override the programmed controls?
3
绳子没有张力,完全松弛,不管吊着的是你还是水桶,均为失重状态。
So the string has no tension, the string goes limp and the bucket of water and you are weightless.