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There are 2.2 billion cell phone users worldwide, a total that is growing by about 25% each year.

全球有22亿手机用户，这个数字每年以大约25％的速度增长。

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But our kids are growing up in an age when long distance is free on their cell phones.

但我们的孩子则生长在打长途免费的年代。

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They're fully functional organisms that can reproduce on their own, and they can start growing outside of any cell and that's what they do, they live extracellularly.

细菌可是麻雀虽小五脏俱全,它们能够凭借自身繁殖,可以在任意一个细胞外开始增殖,它们就是这样做的,在细胞外生长繁殖

耶鲁公开课 - 生物医学工程探索课程节选

It's a picture of cells actually growing and moving in cell culture.

这幅图是真实细胞,在细胞培养液中生长和运动的样子

耶鲁公开课 - 生物医学工程探索课程节选

This makes sense; the rate at which the cell population is growing, the derivative dX/dt, is proportional to the number of cells I have.

这个说的通,细胞数目的增长速度,就是导数dX/dt,和细胞数目呈比例关系

耶鲁公开课 - 生物医学工程探索课程节选

A. By growing these cell lines, they may be able to treat many existing diseases by actually replacing damaged cells with new ones from the laboratory.

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For many, technology is still a nice idea, but despite the fast growing numbers of cell phones, for many these are still out of reach, particularly rural women.

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Scientists have found single-cell archaea bacteria growing at temperatures as high as 234 degrees Fahrenheit at ocean vents on Earth.

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