坐在这谈论化学的人没有意识到原子本身在某种程度上就是一种假设，他们之间的相互反应更是如此，而生物反应又比前两者更甚了。
People who sit there and talk about it don't realize that molecules themselves are somewhat hypothetical, and that their interactions are more so, and that the biological reactions are even more so.
只是在几十年前认识了其生物性，有了化学杀虫剂和空中撒药之后，人们才开始努力控制这种虫害。
Only when its biology was understood and chemical pesticides and aerial spraying became available a few decades ago, could efforts be made to control the insect.
这一发现表明了“与前地球生物的化学品清单和组织棚架的一些生命缺失的环节。”
The finding suggests a "missing link" between the pre-biotic Earth's chemical inventory and the organizational scaffolding essential to life.
“这可以让我们对几千万年甚至上亿年前支配生命的生物化学现象进行研究。”他对BBC自然频道说。
"This offers insight to the [biochemistry] that governed life tens or even hundreds of millions years ago," he told BBC Nature.
30年前，生物学家之间流行的看法是：生命的发生源自化学上的偶然。 因为发生的可能性实在太小，在我们观察能力所及的宇宙范围中，不太可能发生第二次。
Thirty years ago the prevailing view among biologists was that life resulted from a chemical fluke so improbable it would be unlikely to have happened twice in the observable universe.
主要讨论的是煤炭燃烧前脱硫方法的研究，包括煤炭的物理法脱硫、化学法脱硫和生物法脱硫工艺研究。
Host combustion desulfurization is including the physical, chemical and biological methods. The physical method was introduced as main part in this paper.
作为无经验的新手学生，在生物化学研究室中，前几周时间花在洗玻璃器皿和贴试管标签上。
As the newest and least experienced student in a biochemistry research lab, your first few weeks are spent washing glassware and labeling test tubes.
七年前，威克森林大学的生物化学家崔政正在进行一个常规的试验：他给试验鼠注射一种攻击性很强的癌细胞，致死率100%。
Seven years ago, biochemist Zheng Cui of Wake Forest University was conducting a routine experiment, injecting test mice with a strain of cancer cells so aggressive it caused a 100 percent death rate.
本发明公开了一种抗流感病毒前体药，是有关1，3-吡嗪并恶 嗪-2，4二酮的衍生物，其化学结构式为；
The invention discloses an anti-influenza virus prodrug which is a derivative related to 1, 3-pyrazine oxazine-2, 4 diketone with a chemical structural formula (I);
本发明公开了一种抗流感病毒前体药，是有关1，3-吡嗪并恶 嗪-2，4二酮的衍生物，其化学结构式为；
The invention discloses an anti-influenza virus prodrug which is a derivative related to 1, 3-pyrazine oxazine-2, 4 diketone with a chemical structural formula (I);
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