ISBN: 9787221189202 - ingenious science series 2(chinese edition) (1 Ergebnisse)

paperback. Zustand: New. Language:Chinese.Paperback. Pub Date: 2025-01 Publisher: Guizhou People's Publishing House How do we know what time it is? What would our lives be like without clocks and calendars? Do you know what time you get up in the morning? Do you know when a football match starts? Long ago. people observed the sun and moon and estimated time by recording their movements. Over time. people found more ways to measure time. Atomic clocks can tell us the time anytime. anywhere. Is anything smaller than a . …