1. 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。
2. 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。
3. 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。
4. There was an astronaut who peed in his spacesuit before liftoff-- a seemingly inauspicious start to what became the first American manned spaceflight. 曾经有一个宇航员在起飞前尿到了他的宇航服里——这对美国的第一次载人航天飞行来说似乎是一个不祥的开始。
5. Soldiers manned barricades around the city. 士兵把守着城市周围的路障。
