Yes. I suppose the principal thing now is trying to keep all this under our hat.

是的。我想现在最重要的事情就是要保密。

Because for me, the sound is the principal thing.

因为对我来说，声音是最主要的。

Now, the principal thing they were thinking of was the POW in prison camp.

现在，他们考虑的首要的事情是战俘集中营里的战俘。

The principal thing we know about him is that he has led a life of dissipation, and has spent a fortune of his own in doing so.

我们对他的了解主要是他过着放荡不羁的生活， 并为此花费了自己的一大笔财产。

The principal thing, my dear fellow, is to inflame them, and for that purpose you must have an article which will flatter them and cause a sensation.

亲爱的朋友， 最主要的是煽动他们， 为此你必须有一篇文章来奉承他们并引起轰动。

But the principal thing that we know about this young man—who is, indeed, very intelligent—leads us to suppose that, however much he may value your personal merits, he values your money more.

但是我们对这个年轻人的了解——他确实非常聪明——的主要内容使我们假设，无论他多么看重你的个人优点，他更看重你的钱。

It often seems to me that art conceals the artist far more completely than it ever reveals him. And so when I got this offer from Paris, I determined to make your portrait the principal thing in my exhibition.

在我看来，艺术往往比揭示艺术家更彻底地隐藏了艺术家。因此，当我收到巴黎的邀请时，我决定将您的肖像作为我展览的主要内容。