Pieces of which are left in the rain become rusty.
铁片如果被扔在雨里就生锈。
Leave IT for too long, and your skills will become rusty or even obsolete.
离开IT太久的话的你的技能就会过时或者甚至被淘汰。
If you don't practice your English often enough, one day it will become rusty.
如果你不经常练习使用英语，有一天你的英语会生锈。
If you don't practice your English often enough, one day it will become rusty.
如果你不经常练习使用英语，有一天你的英语会生锈。
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