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众所周知，世界是由叫做原子的小微粒组成的。
As is known to all, the world is made up of small particles called atoms.
youdao
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今天，我们已经熟悉原子微粒了。
Today we are on familiar term with the atomic particles.
youdao
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今天，我们已经熟悉原子微粒了。
Today we are on familiar term with the atomic particles.
youdao