研究基因如何控制动物行为的研究人员不得不面对许多不确定因素。
Researchers studying how genes control animal behavior have had to deal with many uncertainties.
在哺乳动物细胞里，启动子是一个包含着许多蛋白质结合位点的复杂区域，它调节基因的表达。
In mammalian cells, the promoter is a complex region containing binding sites for many proteins that regulate gene expression.
这项被称之为“宏基因组”(也有人称其为“元基因组”)的新技术极大地拓展了人们对于海洋(以及其他许多地方，比如温泉和动物的内脏)中的微生物的了解和认识。
Metagenomics, as the new technique is known, has vastly extended knowledge of what bugs live in the sea-and in many other places, from hot springs to animals' guts.
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