科学家们早就发现，每个人对气味的感知不同。
Scientists have long known that people perceive scents differently.
科学家们已经知道，银河系的每个卫星星云藏有一千万颗恒星。
The Milky Way's known satellites harbor up to ten million stars each.
每个人都有自己的梦想，有的想要成为教师，有的则想要成为科学家。
Every one has his dream. Some want to be teachers, others want to be scientists.
每个人都有梦想，有的人想当老是，有的人想当科学家。
Every one has his dream. Some want to be teachers, others want to be scientists.
科学家利用一个单独的传感器来记录运动的每个方向。
The scientists use a separate sensor to record each direction of movement.
每个阶段都不相同，科学家们相信，双胞胎很可能独一无二。
Each stage is unlikely, and scientists believe the twins are probably unique.
每个阶段都不相同，科学家们相信，双胞胎很可能独一无二。
Each stage is unlikely, and scientists believe the twins are probably unique.
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