短语词组用作动词 (v.)～+名词harden the body 锻炼身体harden one 's heart 心肠变硬harden steel 淬火～+副词harden considerably 很坚硬harden utterly 非常坚定harden in 拉紧harden off 使长壮以移植户外harden up 变得坚实～+介词harden into 凝固成harden to 对…变得无动于衷harden toward 对…冷酷无情短语 返回 hardens