VOA慢速英语:Saturn’s Cassini to Dive Deep, Burn Up

短语讲解：

1.“Scientists and engineers have decided that instead of just letting it run out of fuel on its own and then not being able to control any of its instruments, they're going to manually and intentionally de-orbit the space craft.”

instead of （用…） 代替…， （是…）而不是…， （用…）而不用…
例句：Every winter some old people die from hypothermia.
每年冬天都有些老人死于体温过低。
run out of 用完; 耗尽; 从…跑出
例句：They have run out of ideas
他们已经想不出任何办法了。

2.In other words, NASA will make Cassini crash into Saturn, on purpose.

in other words 换句话说; 就是说
例句：The mobile library services have been reorganised — in other words, they visit fewer places.
流动图书馆服务重新作了安排——换句话说，他们去的地方减少了。

3.Why are scientists concerned about this?

concern about 使（自己）关心…;
例句：The group has expressed concern about reports of political violence in Africa
该团体对有关非洲政治暴力的报道表示关切。

4. Like the scientists, Devin Waller of the California Space Center is looking forward to the big event.

look forward to 期望，盼望; 瞩望; 属望
例句：He was looking forward to working with the new Prime Minister.
他期待着与新首相共事。

5.As soon as we hit the upper atmosphere the probe is going to start to fall apart.

as soon as 一…就…; 一经
例句：I'll give him your message as soon as he's available.
他一有空我就转告他您的留言。