At once và right now
1. at once
a. immediately, without delay: ngay tức khắc, không được trì hoãn
VD:
Come here at once!
Bake for 35 minutes and then serve at once.
The women met at a party and became good friends at once.
b. at the same time: cùng một lúc
VD:
Don't all speak at once!
I can't do two things at once.
Kolya, a film from the Czech Republic, is at once extremely funny and sad.
2. right now
a. immediately, without delay: ngay tức khắc, ngay lập tức ( = right away)
VD:
Do it right now!
Go to bed right now!
She called and asked me to come over right away.
b. at this moment, at the present time: hiện giờ, bây giờ...
VD:
He's not in the office right now.
We're working on it right now, so it should be ready soon.