There is only one thing for it then — to learn.

然而唯有一件事不变——那就是学习。

There is only one thing for me to do, but you'll be furious if I mention it.

我能做的只有一件事，但我说出来你会发怒的。

There is only one thing I ask in return for my help — such as it is. You must keep my secret and tell no one I am a humbug.

只有一件事情，我要请求人们帮助我，作为对我工作的报答——就是这样：你们必须严守我的秘密，不要去告诉什么人，说我是一个骗子。

There is only one thing for a man to do who is married to a woman who enjoys spending money, and that is to enjoy earning it.

与一个喜欢花钱的女人结婚的男人只有一件事要做，那就是喜欢挣钱。

He comes to know a new, strange loneliness and it is this knowledge which makes him suffer, So there is only one thing for the lover to do.

他会逐渐地认识到一种新奇而又陌生的孤寂。而且，正是这一认识使他忍受痛苦。因此，施爱者只有唯一一种选择。