数学是研究现实生活中数量关系和空间形式的数学。

Mathematics is the study of quantitative relationship between real life and space form of math.

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数学语言是一种特殊的科学语言，它是指一切用以反映表达数量关系和空间形式的语言。

Mathematics language is a kind of special scientific language, which is to reflect and express the relationship between quantity and space forms.

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他收集的数据得出了一个关于房间回声持续时间、吸音材料的数量和质量以及空间体积之间关系的数学公式。

The data he compiled yielded a mathematical formula for the relationship between a room's echo duration, its quantity and quality of sound-absorbing materials, and its spatial volume.

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If X is the number of cells, then the rate of change of X, dX/dt, the rate of change of the cell population, how fast division is taking is proportional to the number of cells I have.

如果X是细胞数目,那么X的改变率就是dX/dt,就是细胞数目的改变率,分裂的速度有多快,和细胞数量呈比例关系

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