我小學時參加勞動就會騎三輪了，後來學騎自行車要改轉彎時收胳膊的習慣。現在的兒童也是，先騎小三輪車，再學自行車。

來源: pvct 於 2022-07-18 08:50:10 [舊帖] [給我悄悄話] 本文已被閱讀：次

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