If the machinery were not maintained properly, It would get rusty as time passes.
机器要不好好养护，久而久之就要生锈。
Even your bike riding skills can get rusty if you don't use them regularly.
如果不常练习，你有可能连自行车也会忘记怎么骑。
Some people's bodies get 'rusty' faster than others, and this makes them age more quickly.
某些人的身体比其他人‘生锈’得快，导致他们更快衰老。
Some people's bodies get 'rusty' faster than others, and this makes them age more quickly.
某些人的身体比其他人‘生锈’得快，导致他们更快衰老。
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