The key difference in this study was the presence of a single gene from the H3N2 human virus: the PB2 protein, which gave the hybrid viruses the ability to spread easily among the lab mice.

这项研究中一个关键的不同点就是H3N2人类流感病毒中存在一个蛋白基因：PB2蛋白，它的存在使得杂交病毒具有了在实验小鼠之间轻易传染的能力。

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But it will not be bored to the study of philosophical discussion of the day special theory of relativity or the human ability to settle on Mars and be too worried.

但也不会无聊到整天研究哲学讨论狭义相对论或人类能否移居火星而过分担忧。

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AIM: to study the inhibitory effects of carboxymethyl-chitosan on proliferation and metastatic ability in human highly metastatic lung carcinoma 95-d Cells.

目的：评价羧甲基壳聚糖对人高转移肺癌细胞- 95 - D增殖能力和体外转移能力的抑制作用。

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Why is it that after all our ability to study world history and human behavior in the many schools of higher learning that we have that we are so ignorant of the most obvious?

FORBES: Connect

As a study by UCLA found in 2007, the human brain is wired to over-estimate the size of risks, underestimate your ability to handle them and downplay the costs of not taking them.

FORBES: Sheryl Sandberg is Right. Women Must 'Lean In' to Risk