还 Return ; give back ; Also ; still

还原剂 [助剂] reducing agent ; [助剂] reducer ; reductive agent

打铁还需自身硬 It takes good iron to make good products. It takes a good blacksmith to make good steel. The iron must be of good quality to be hammered / struck into a tool. ; “It Takes a Good Blacksmith to Forge Good Tools” ; “It takes good iron to make good products.”

退耕还林 to afforest marginal farmland ; returning farmland to forests ; turn farmland into forest ; sloping land conversion program

还原糖 reducing sugar ; sugars reducing ; Reduce Sugar ; Reducing saccharide

无人生还 And Then There Were None ; No One Lives ; Ten Little Indians ; Desyat negrityat ; [电影] suspicions/agatha christie's 'ten little indians'

以眼还眼 Eye for an Eye ; lex talionis ; for an eye

偿还 pay back ; repay ; pay for ; compensate

返老还童 The Curious Case Of Benjamin Button ; Rejuvenation ; Rejuvenate ; juvenescence

退耕还林还草 to return more farmland to forests and grasslands