take the plunge idiom
C2 （尤指经过长时间考虑后）决心行动，打定主意
to make a decision to do something, especially after thinking about it for a long time
They're finally taking the plunge and getting married. 他们终于打定主意要结婚了。
英汉双解词典收录81607条英汉双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。