改造包括改进催化剂质量，更换酸塔填料，扩大酸冷却器和冷却塔。

The quality of catalyst and the packing in the acid towers is to be changed. The acid coolers and cooling tower are to be increased in size.

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尝试放一些腐殖酸在小麦皮塔面包上。

Try humus on wheat pita bread.

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对于罗塞塔(Rosetta)来说，这个问题是要执行一项任务，找出蛋白质，这种由名为氨基酸的化学物质链接而成的东西，是如何选定其最终的三维形态的。

For Rosetta, that problem was the task of figuring out how proteins, which are composed of a chain of chemicals called amino acids, adopt their final, three-dimensional shape.

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