I wanted to hire his steam launch.

我要租他的汽船。

But what good is a steam launch without coals?

可是汽船没有煤烧怎么走呢？

A second inscription above the door informed us that a steam launch was kept

在门上另外有一块牌子，上面说这里另备有小汽船。

Why, bless you, sir, it is in the steam launch that he has gone.

先生呀，他就是坐那汽船走的。

Well, then, in the first place I shall want a fast police-boat–a steam launch–to be at the Westminster Stairs at seven o'clock.

好，头一件：我需要一只警察快艇--一只汽船--今晚平时开到西敏士特码头待命。