中国今年将发射火星探测器。

China will launch Mars probe this year.

youdao

此前，NASA曾多次向火星发射探测器，大半以失败告终。

More than half the probes NASA had previously sent to Mars had failed.

youdao

此前，NASA曾多次向火星发射探测器，大半以失败告终。

More than half the probes NASA had previously sent to Mars had failed.

youdao