In the team's system, the viruses simply act as a kind of scaffolding, causing the pigments and catalysts to line up with the right kind of spacing to trigger the water-splitting reaction.

在该团队的系统中，这些病毒只是作为一种支架，使色素和催化剂的排列起来，并具有合适的间距以触发水的裂解反应。

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The threshold level at which some kind of reaction can occur may be less than a thousandth of a potentially fatal dose, so where do you draw the line?

可能发生某种反应的临界值也许不到可能致命剂量的千分之一，那么，你在哪里划这条线呢？

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All art is a reaction the first line drawn.

所有的艺术都是从画第一条线开始。

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The key factors are cultural and generational divisions, the victim's refusal to toe a line and a reaction against a family or clan's self-proclaimed code or rules.

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The line got the opposite reaction from the right, some of whom has questioned Romney's conservative convictions.

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Meanwhile, analysts believe the company's downscale Old Navy unit still has more work to do, though Merrill Lynch's Mark Friedman said consumer reaction toward a line of vintage 60s-era hippie t-shirts has been strong.

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