And a new generation of orbiters and landers that being sent to Mars.
2
对于CSS验证器来说，对浮动环绕的效果而使用了特定的前缀的时候，则应该提出一个建议而不是一个错误。
There’s a suggestion floating around that CSS validators should change their behavior regarding vendor prefixes by issuing a warning instead of an error.
3
根据实际的推进选择，以及航天器能够减速以环绕其目标公转的需要，目标恒星不能离地球超过15光年。
Given realistic propulsion options, and the requirement that the spacecraft can slow down to orbit its target, the target star cannot be more than 15 light-years from Earth.
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