近日點與太陽日 - 地球科學討論
By Catherine
at 2007-02-28T21:00
at 2007-02-28T21:00
Table of Contents
今天在書裡看到的,想請問各位大大
「地球在近日點時的太陽日較遠日點時為長」
為什麼呢ꨊ
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地球科學
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