The atomic theory was not accepted until the last century.

原子学说直到上个世纪才被人们所接受。

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But, at the same time, we do know about the atomic theory of matter.

但是，同时我们也知道，物质的原子理论。

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The atomic theory is valuable not only in theory, but also in practice.

原子模式理论不仅具有理论价值，更具有实践的指导意义。

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For example, in terms of the atomic theory of matter, at the time at the turn of the Century, the understanding was that atoms were the most basic constituent of matter, meaning you couldn't break atoms up into anything smaller - that was it, you're done.

例如在原子理论中,在19，20世纪之交的时候,人们认为原子是,组成物质的最基本粒子,也就是说你不能,把原子再分割了,就这样了。

麻省理工公开课 - 化学原理课程节选

One example of which the White House is fond is the atomic clock the Pentagon helped Harvard to develop so that scientists could test Einstein's theory of relativity.

ECONOMIST: The knowledge factory

We can understand atomic theory, and we can understand literature and learn about the great works of art and all the great things of culture, but why?

FORBES: Has Education Lost Its Soul? (Pt. 2)

My desperation is lessened, however, by some of the more quantum physics theory which seems to suggest that, if at a sub-atomic level quarks can be in two places at once, then logically there must be a parallel universe where NZ were 130 all out and we are about to win.

BBC: First one-day match as it happened