logistic curve of population growth 人口增长的算术曲线
A curve of environmental change was presented and related to a curve of population change and the process of industrialization, and the environmental change was divided into four stages.
作者提出环境变迁曲线，与人口转变曲线、工业化过程相联系，并划分了环境变迁四个阶段。根据环境变迁过程以及动因，在国际比较范围内，进一步说明了中国环境变迁的特点。
THE population of bugs in a Petri dish typically increases in an S-shaped curve.
在皮氏细菌培养皿内，细菌数量的增长模式是典型的“S” 曲线。
The bell curve distribution for IQ scores tells us that two thirds of the world’s population have an IQ somewhere between 85 and 115.
IQ分数的正态分布图告诉我们世界上三分二的人智力在85-115之间。
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