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perpetual calendar的英文翻譯是什么意思，詞典釋義與在線翻譯：
英英釋義
Noun:
-
a chart or mechanical device that indicates the days of the week corresponding to any given date over a long period of years
perpetual calendar的用法和樣例：
例句
- Products are mainly used in computer motherboards, calculator, calendar, watches, cameras, cordless phones and so on.
產品主要應用于電腦主機板，計算器，萬年歷，手表，照相機，無繩電話等。
