The word clock appeared first in English in the 9th century but at first it didn't mean a device for measuring time.
9世纪时英语中第一次出现了“clock”这个词，但最初这个词并不表示计时的器具。
The word clock appeared first in English in the 9th century but at first it didn't mean a device for measuring time.
9世纪时英语中第一次出现了“clock”这个词，但最初这个词并不表示计时的器具。
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