我想要主修生物学，因为我一直在思考生命的起源。
I want to major in biology because I have long wondered about the origin of life.
因此，关于鸟类的起源、恐龙和早期鸟类的生物学特性等一系列未解之谜都笼罩在困惑之中。
Confusion consequently reigns over a broad spectrum of unanswered questions dealing with avian origins and the biology of dinosaurs and early birds.
然而，生物学中尚未解决的最深奥的问题是生命起源本身。
However, the most profound unsolved problem in biology is the origin of life itself.
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