?投入
... fling mud at 诽谤 fling off 发出 fling oneself into 投入 ...
?奋力从事
... fling oneself out 手舞足蹈; 发怒而暴跳 fling oneself into 毅然投身于; 奋力从事 fling oneself upon 毅然投身于; 奋力从事 ...
?毅然投身于
?投身于
... flatter oneself 自以为是，自鸣得意 fling oneself into 投身于… fling oneself against/on 猛扑向… ...
救人之危
挺身担当重任
投身于
投入；积极从事…
jump in??/??plough into
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。