如果用不胀钢做钟摆，摆锤升降的距离就很小，这样无论夏季或冬季，钟都走得很准。

如果用不胀钢做钟摆，摆锤升降的距离就很小，这样无论夏季或冬季，钟都走得很准。的英文翻译

基本释义

• If the pendulum is made of invar,the bob does not rise or fall much. So the clock keeps good time in summer and winter.