He has done it by exploring, by experimenting, by trying it out and seeing whether it works, by gradually changing it and refining it until it does work.

他不断探索、实验、尝试并检验成效，不停修改、改进，直到它能顺利运行。

youdao

Recycling it requires only a tiny fraction of the energy consumed when mining bauxite and refining it into the same amount of metal.

回收它们所需要消耗的能量，跟重新开掘并提炼相同质量金属的能耗相比，只是一个很小的数目而已。

youdao

That's pretty crude right now-we're refining it-but we're getting the first statistics that are allowing us to make those estimates.

那样概括可能太粗糙了，我们正在完善它，但是我们正在获取允许我们做出那些估计的第一手统计资料。

youdao

Refining it involves removing the outer layers, including the husk,bran and germ, leaving the inner white kernel.

VOA: standard.2010.06.25

Hence, the gasoline like crude is selling for a discount and some folks are reportedly refining it in the field.

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But the medicine had a potential for toxicity, and he spent years refining it before founding a company called Centaur.

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Like most big integrated U.S. oil outfits, ExxonMobil is very efficient at getting oil out of the ground and refining it.

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