He'd had to swim for it in his time.

在他那个时代， 他不得不游泳。

Who wanted cold water in the dawn unless they had to swim for it?

除非他们必须游泳， 否则谁会在黎明时想要冷水？

" Nothing; only I shall swim for it if the worst comes to the worst. I suppose you can't swim under water at all" ?

“没什么； 只是万一发生最坏的情况， 我会游泳。我想你根本不会在水下游泳” ？