call on

US /kɔːl ɑːn/
UK /kɔːl ɑːn/
"call on" picture
1.

請, 呼籲

to ask someone in a formal way to do something

:
The teacher decided to call on a student to answer the question.
老師決定一位學生回答問題。
The president will call on the nation to unite during this crisis.
總統將呼籲全國在此危機期間團結起來。
2.

拜訪, 看望

to pay a brief visit to someone

:
I decided to call on my grandmother after work.
我決定下班後拜訪我的祖母。
We should call on our neighbors to see if they need anything.
我們應該拜訪我們的鄰居,看看他們是否需要什麼。