on the spot
US /ɑn ðə spɑt/
UK /ɑn ðə spɑt/

1.
當場, 立刻
immediately; at once
:
•
He had to make a decision on the spot.
他必須當場做出決定。
•
The police arrested the thief on the spot.
警察當場逮捕了小偷。
2.
左右為難, 陷入困境
in a difficult situation from which it is hard to escape
:
•
His boss put him on the spot by asking about the missing funds.
他的老闆詢問失蹤的資金,讓他左右為難。
•
I was put on the spot when asked to sing at the party.
當被要求在派對上唱歌時,我感到左右為難。