My secretary is very discreet. She never tells anyone unconcerned anything about the company's business.

"我秘书很谨慎,她对公司业务从不对任何无关人。"

It wasn't discreet of you to ring me up at the office.

打电话到我办公室真是太鲁莽了。

We have discovered that the young man is a discreet and economical fellow.

我们发现这个年青人是个既谨慎又有经济头脑小伙子。

I should make a few discreet enquiries about the firm before you sign anything.

我应先审慎打探一下这家公司底细, 然后再签字。