The results suggest that beginning a diet with a fast or near-fast may alter brain chemistry in a way that adversely affects mood and motivation, undermining the person's weight-loss efforts.

结果显示，在减肥的一开始就禁食或近似禁食会改变大脑化学物质，对情绪和积极性造成不利影响，也会打击人地减肥努力。

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Is chemistry doomed from the start? Will it fizzle and die just as fast as the flame was lit?

性化学反应只能从头开始吗？它只是像火苗一样瞬间闪亮然后就销声匿迹吗？

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New method of chemistry container connecting leg blanking was introduced, and got exact unfold picture by computer. The method is fast, exact and dependable.

介绍了化工容器连接管下料的新方法，借助于计算机得到精确的展开图，该法快捷方便，精确可靠。

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It is remarkable how fast carbon dioxide emissions are altering ocean chemistry.

UNESCO: CULTURE