on the phone
US /ɑːn ðə foʊn/
UK /ɑːn ðə foʊn/

1.
在打电话, 通电话
speaking to someone using a telephone
:
•
She was on the phone for an hour with her sister.
她和她姐姐通电话一个小时。
•
I can't talk right now, I'm on the phone.
我现在不能说话,我正在打电话。
在打电话, 通电话
speaking to someone using a telephone