safe bet

• 必胜的赌注； 有把握的事情

safe bet的用法和样例：

例句

1. Some people assume that investing in stock is a safe pursuit ,but their assumption fails to hold water when considering the substantial risk involved.
   有的人想当然地认为投资股票是有把握的事情，但是，考虑到涉及的巨大风险，他们的想当然就说不通了。