题目

英语翻译
For mixtures of different components such as gelatin and fat,we do not see a fixed melting and congealing point but rather a melting and congealing trajectory.
For example,animal fats consist of a mixture of different types of fat.Each kind has its specific congealing point.When cooling a mixture of different types of fats,first the fat to solidify is the fat with the highest congealing point,while the remaining fat continues to be liquid.If the mixture is further cooled down,then the remaining fats,also step-by-step,congeal at their own congealing point.
Because there are many different fats in the mixture with only small differences in congealing temperature,it seems that the mixture gradually congeals.This congealing process does not take place at a single temperature,but the coagulation begins at a relatively high temperature,and the mixture is only fully congealed at a lower temperature.
The starting point of the congealing process (more or less) corresponds t

提问时间：2022-01-04

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