例句 /

Each mission had a satellite designed to photograph the surface of Mars from orbit, and to act as a communication relay for the Viking lander that each mission carried.

详情正文

登录后查看完整内容

使用 DeepEvidence / 梅斯账号登录,新用户可在登录页面注册。

登录成功后将返回当前页面,继续浏览。