Day 4-5 單詞總結(jié)
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Day 6 邏輯圖
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Day 7 總結(jié)
It's really fun but irritating to read The Brief History of Science, especially when I figure out the postulate that space-time is curved under the general theory of relativity.
It's known to me that universe has four dimensions with three spatial coordinates and time measure in theory of relativity. But I have long supposed that time is separated from space. Maybe it's because that I live in a space that bodies travel under or at the speed of light.
