He needn't worry about us now.

他现在不必担心我们。

youdao

Mom suspicious, began to worry about us.

妈妈起了疑心，开始为我们担忧。

youdao

Telephone him at once so that he may not worry about us.

请马上给他打个电话，以便让他不担心我们。

youdao

So let us see it. I am sure I will help him. Do not worry about it.

VOA: standard.2009.11.08

Just don't worry about him now.He's safe. The tracker's following us.

VOA: standard.other

So far this threat may have manifested itself most obviously in European countries, but the US continues to worry about operatives attacking the US or entering the US from Europe.

BBC: Al-Qaeda resurgent six years on?

"We won't have to worry about robots replacing us quite yet, " added Titan's Mr. Etherington.

WSJ: Auction System Helps Place Digital Outdoor Ads

Even they disagree about the actual risks, though, and most of us do not worry about runaway atomic colliders.

FORBES: Magazine Article