He's not tough enough for a career in sales.

他干推销这一行缺少足够的韧劲。

《牛津词典》

Do you believe that sentences for criminals are tough enough at present?

你认为对犯罪分子目前的刑罚足够严厉吗？

《柯林斯英汉双解大词典》

These findings are in agreement with what you would expect from the evolutionary theory: those who like to make friends and help others can gather enough resources to make it through tough times.

这些发现与你对进化论的期望是一致的：那些喜欢交朋友和帮助别人的人能够收集足够的资源来度过艰难时期。

youdao

The head of the government's mine safety agency acknowledged enforcement of existing laws has not been tough enough.

VOA: standard.2010.04.27

There is skepticism among some officials that Paris has made enough tough decisions to deserve a concession.

WSJ: In Small, Measured Steps, Europe Loosens Austerity

But the Police Federation of England and Wales said current regulation was enough in tough financial times.

BBC: Police corruption: Gifts and second jobs to go on register

Romney has loudly criticized rivals Rudy Giuliani and Mike Huckabee for not being tough enough on illegal immigration.

NPR: Romney Fires Landscapers over Immigration