Typo, it should be 9 meter per second.

來源: DrunkerKickass 於 2011-05-19 21:44:17 [] [舊帖] [給我悄悄話] 閱讀數 : (70 bytes)
回答: 時速30公裏=9公裏每秒? 由 biglow 於 2011-05-19 20:47:28

bullshiting? I never heard of it, check the dictionary before posting.

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