英语语法分析

In thirty years from now the United States should have a manned spacecraft on Mars.

从现在开始30年内，美国会把载人航天器送上火星。

《柯林斯英汉双解大词典》

Cyrano was dead and buried for a good three centuries before the first manned rockets started to fly.

在第一批载人火箭开始飞行之前，西拉诺已经死了，且已被掩埋了整整三个世纪。

It could also insist on checking private manned spacecraft as thoroughly as it does commercial aircraft.

它还可以像检查商用飞机一样彻底检查私人的载人航天器。