The answer to this riddle lies in the metabolic activity of early photosynthetic life-forms that slowly but surely transformed the chemical composition of Earth's atmosphere.
这个谜题的答案在于早期光合生命形式的新陈代谢活动，这种活动缓慢但一定改变了地球大气的化学成分。
He who has explained this riddle has explained my life. Yet who was there among my contemporaries that understood this?
谁能解释这个谜，他就能解释我的一生。可是当代人有谁能了解这一点？
The answer to this riddle lies primarily in the totally different ways colors are achieved with light and with pigments.
这个谜的答案主要在于光线和颜料构成颜色的方法是完全不同的。
Lost somewhere in the blank spot in the middle of the Jurassic lies the answer to this riddle: how did some dinosaurs go from one era to the next?
探索侏罗纪中期的空白时期，便可解开这道谜题：有些恐龙是如何跨足下个年代？
Lost somewhere in the blank spot in the middle of the Jurassic lies the answer to this riddle: how did some dinosaurs go from one era to the next?
探索侏罗纪中期的空白时期，便可解开这道谜题：有些恐龙是如何跨足下个年代？
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