The scientist's discovery unlocked the secrets of the universe.
Meaning: This sentence describes the scientist's discovery as being something that revealed hidden knowledge about the universe.
Choice of Words: Scientist is a person who studies science. Discovery is something new that is found out. Unlocked means to open something that is locked. Secrets are things that are kept hidden. Universe is everything that exists. Together, "scientist's discovery unlocked the secrets of the universe" means the scientist's new finding revealed hidden knowledge about the universe.
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