senior high school

In the teaching of Probability in senior high school lie obvious inadequacies in students' comprehension of Probability definition for Frequency and Equiprobability models.

在中概率学习中，学生对概率的频率定义与古典概型的理解存在明显的欠。

The family had undergone great hardship to let him attend senior high school in county town, which meant a big fellow was consuming food without earning any workpoint.

家里能让他这样一个大后生不挣工分白吃饭，让他到县城来上中，就实在不容易了。