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Cells cannot remain alive outside certain limits of temperature and much narrower limits mark the boundaries of effective functioning. Enzyme systems of mammals and birds are most efficient only withi
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Some bacteria have adapted to super cold environments for millions of years. And scientists have isolated some of the essential genes that allow bacteria to tolerate their harsh living conditionsbecause these same genes might help in the creation of
It is now over two months since we sent in the order for Tape Recorders. 我们订购你方的录音机已经两个多月了。 It is now over two months since we sent in the order for Tape Recorders. 我们订购你方的录音机已经两个多月了
为了在未来十年内将道路交通死亡人数减少一半,欧盟最近提出了一系列道路安全行动计划,其中包括建议在公交车、出租车以及货车上安装功能类似飞机黑匣子的行驶数据记录器。这种汽车