take the plunge
US /teɪk ðə plʌndʒ/
UK /teɪk ðə plʌndʒ/

1.
採取行動, 下定決心
to decide to do something important or difficult that you have been thinking about for a long time
:
•
After years of deliberation, they finally decided to take the plunge and buy a house.
經過多年的深思熟慮,他們最終決定採取行動買房。
•
She was nervous, but she knew it was time to take the plunge and start her own business.
她很緊張,但她知道是時候下定決心創辦自己的公司了。