我小学时参加劳动就会骑三轮了，后来学骑自行车要改转弯时收胳膊的习惯。现在的儿童也是，先骑小三轮车，再学自行车。

来源: pvct 于 2022-07-18 08:50:10 [旧帖] [给我悄悄话] 本文已被阅读：次

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