Markus Ribbe, a scientist at the University of California-Irvine, says in a new paper that the enzyme could be further tweaked to make longer carbon chains than those that make up propane.

美国加州大学欧文分校的科学家马库斯•里贝在自己新撰写的文章中介绍说，这种酶可以被进一步修改，届时能转化出比丙烷更长的碳链。

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In the wild, a lone human would not be able to survive without culture, explained evolutionary theorist Rob Boyd of University of California, Los Angeles.

洛杉矶加利福尼亚大学的进化理论学家鲍勃·博伊德解释说，在野外没有文化的环境中，单独一个人可能没法生存。

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But Gerardo Aldana, a professor at the University of California, Santa Barbara, says the data supporting the widely-adopted conversion factor may be invalid.

不过美国加州大学圣巴巴拉分校格拉尔多•阿尔达纳教授对此表示质疑，他说支持广泛采用的历法转换数值可能是无效的。

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Even more ominously, he used his inaugural address to announce that children who graduate in the top 4% of their schools will be guaranteed a place in the University of California, regardless of their absolute performance.

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Dean Cliver, professor of food safety emeritus at University of California Davis, said it would be premature to draw broad conclusions about all soda fountains from a localized study.

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According to Gary Jacobson of the University of California, San Diego, only a small part of that gap can be explained by the fact that Republicans tend to be richer and are doing better in the expansion.

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