Be careful about what you say and do.

说话行事要谨慎／谨言慎行。

He also says the US needs to be cautious with its words and deeds.

他表示，美国需要谨言慎行。

Coming from the top, this really makes employees think twice.

由于高层的这种立场，员工的这方面谨言慎行。

I'm very very aware of my tongue...-Ross: Come on! Come on! -Chandler: Here goes.

我一向谨言慎行… … -加油！加油！-我了。

He learned his business, and so will you. Even Mr Carson wasn't born standing to attention.

他学了看家本领，你也会。卡森管家也生就谨言慎行。

" To be discreet" means to be careful about what you say and do.

“谨言慎行”的意思要小心你的言行。

You'd better be careful what you say. - Very.

你最好谨言慎行 -我很小心。

A trip to China sounds nice... If you tread lightly...

中国听来错 只要你谨言慎行。

Well, there you go. Maybe some of your gambling spirit will rub off on me.

没有人会因为谨言慎行而指责你的。

He is bound by civic responsibility to practice the art of circumspection, which is entirely the opposite.

要执行公务讲究的谨言慎行，这跟礼节沾上边。

Seems like you not only have to dot your i's and cross your t's … you also need to watch your p's and q's!

看起来你仅要小心注意细节，还需要谨言慎行！

I want to tell him, and to Lebanon, which hosts this organization that aspires to destroy us, watch what you say, and be careful about what you do.

我想告诉他，告诉拥有这一组织的黎巴嫩，该组织企图毁灭我们，要谨言慎行。

To progress in your chosen career, William, you must remember that a good servant at all times retains a sense of pride and dignity that reflects the pride and dignity of the family he serves.

要想这行混得好，威廉，须牢记一名称职的仆人时刻要谨言慎行，这关乎你雇主的体面和尊严。