1·After a thorough investigation, many experts now believe that the streak was a run-of-the-mill jet aircraft contrail.
经过彻底的调查，许多专家现在认为，这条轨迹是一条普通的喷气式飞机尾迹。
2·Today people and goods travel by jet aircraft and fast ships, and information is transmitted at the speed of light over the Internet.
人和货物通过喷气式飞机和快船来流动，而信息是通过互联网以光的速度传送。
3·Jet aircraft now can fly the Atlantic in a few hours.
喷气式飞机如今数钟头就可飞越大西洋。
4·That's why jet aircraft fly in the lower stratosphere !
这就是为什么飞机要在低平流层飞行的原因。
5·Since the advent of jet aircraft, travel has been sped up.
自从喷气式飞机出现后，旅行的速度加快了。
6·Turbulence isn't dangerous to a jet aircraft but it is to the people in it.
对于飞机来说气流颠簸并不危险，但是对于飞机里的乘客来说可不是这样。
7·Turbulence isn't dangerous to a jet aircraft, but it is to the people in it.
对于飞机来说气流并不危险，但是对于飞机里的乘客来说可不是这样。
8·I don't like the noise of these jet aircraft, but I've learnt to live with it.
我厌恶这些喷气式飞机的噪音，但我已经学会去忍受它了。
9·Rules of the game: jet aircraft in the air while running shot while winning bubble.
游戏规则：喷气飞机在空中一边喷着白雾，一边夺取泡泡。
10·This chain eventually led to jet aircraft, nuclear power, and giant radio telescopes .
这一链条后来导致了喷气式飞机，原子能和巨型射电望远镜的发明。