step off the deep end

例句：

1. 1.He decided to step off the deep endand take a risk.
   他决定冒险，跳入深水区。
2. 2. She steppedoff the deep end ofher career and started a newbusiness.
   她从职业生涯的深水区跳出来，开始创业。
3. 3. The company wasfacing financial difficulties, so they had tostep off the deep end and make sometough decisions.
   公司面临财务困难，所以他们不得不跳入深水区，做出一些艰难的决策。