They're set afloat on often rickety or overloaded boats.

他们经常在连接不牢固或超过载重的船上摇摇晃晃。

Then he set it afloat as he had the others.

它让这个树枝漂到水里，就像它以前做过的一样。

In short, he was of the age that had wrought American independence and set the government afloat.

简而言之，他正处在促成美国独立并让政府运转的年龄。

The navy of Nicephoras Phocas in the tenth century would have annihilated in half an hour any navy that Carthage or Athens or Rome ever set afloat.

10 世纪 Nicephoras Phocas 的海军可以在半小时内歼灭任何迦太基、雅典或罗马曾经下过水的海军。