Dec 02

Decadeは十年間。Decahedronは十面体。十分の一を数える数字の前におく小数点はdecimal pointです。Decathlonとは十種競技、十個の協議を競うイベントです。ではなぜDecemberが十月ではないのでしょう?実は昔、10個目の月でした。名前が決まった後に月が二つ増えました。

A decade is ten years. A decahedron has ten sides. We put a decimal point before a number indicating tenths. A decathlon has ten different athletic events. Why isn’t December the tenth month? Actually, it used to be the tenth month, before two more months were added to the calendar.

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