例句與造句

1. the united states has announced its own plans to expand exploration of mars and eventually send a manned expedition there
   美國已經(jīng)宣布其準(zhǔn)備加強(qiáng)火星探索并最終將一支探險(xiǎn)隊(duì)送到火星的計(jì)劃。
2. It's difficult to find manned expedition in a sentence. 用manned expedition造句挺難的