改善家庭能耗并非难事。It doesn't take much to improve the energy efficiency of your home.[谚]世上无难事,只怕有心人.Nothing is difficult to a man who wills.一旦他们试着种植兰花，就会发现那并不是什么难事。Once they have tried growing orchids, they will see there ...

“难事”的英语可以翻译为：difficulty，a hard nut to crack，a piece of work，tickler，twister ...

“难事”的拼音为：nán shì...