A specific protein, called the hypoxia-inducible factor protein, controls genes that help calls survive under low-oxygen conditions. Areas of low oxygen are common for fast-growing tumors.
一种被称为缺氧诱导因子蛋白的特殊蛋白，控制帮助低氧条件下生存的基因。低氧的区域通常产生肿瘤的快速生长。
The obtained mutant strain was genetically stable, grew fast, had low demand for oxygen, and a very high lipase activity.
结果发现，该菌株遗传稳定，生长快，酯酶活力高，对氧的需求低。
For example if you want to kick fast for a time. Getting a lot of oxygen is very important during a timed swim.
比如，你想要有更快的打腿，在一个有限的时间里，获得充足的氧气很重要。
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