What would life be like with no clocks and no calendars? How would you know when to get up in the morning? Long, long ago, all people could do was watch the sun and moon and try to figure things out. Eventually, they made simple clocks like sundials.
發表於2025-03-21
How Do You Know What Time It Is? 2025 pdf epub mobi 電子書 下載
圖書標籤:
How Do You Know What Time It Is? 2025 pdf epub mobi 電子書 下載