The greatest concern the authors raise is space debris—pieces of "junk" that orbit the earth, with the potential to cause serious damage if they collide with operational units, including the ISS.

作者提出的最大担忧是太空碎片，即环绕地球的“垃圾”碎片，如果它们与包括国际空间站在内的运行体相撞，将有可能造成严重损害。

youdao

The greatest concern the authors raise is space debris-pieces of "junk" that orbit the earth, with the potential to cause serious damage if they collide with operational units, including the ISS.

两位作者提出的最大担忧是太空垃圾——环绕地球运行的“垃圾”碎片，如果它们与包括国际空间站在内的运行单位相撞，可能会造成严重损害。

youdao

In the interview, Hawking rejected the notion of life beyond death and emphasised the need to fulfil our potential on Earth by making good use of our lives.

在此次采访中，霍金驳斥了死后有来生的观念，强调了通过充分利用我们的人生去发挥自己在地球上的潜能的需要。

youdao

Mr Williams denied the delay had anything to do with opposition posed by local people, who are also concerned about potential earth tremors.

BBC: Keynsham fracking plans put on hold by UK Methane

He and others also tried to convince the American government that the risk from big meteorites justified a more comprehensive search for potential earth-hitters.

ECONOMIST: Gene Shoemaker

It illustrated how vast the search is (and will become) and its potential impact on Earth's inhabitants.

CNN: Should we fear space aliens?