Definition
To become involved in a situation or activity impulsively and without careful consideration.
毫不考虑地参与、落入（某事或情况）
He always jumps in with both feet, without fully understanding the situation first.
他总是未经深思熟虑便贸然行动，没有先充分了解情况。
Before investing in any venture, you should do your homework, not jump in with both feet.
在投资任何项目之前，你应该先做好功课，而不是贸然投入。
She took on the complex job, jumping in with both feet despite having no prior experience.
她接受了这份复杂的工作，尽管没有相关经验，还是贸然投入。