The students are in geometry class. 

學生們正在上幾何的課。

Geometry is a study of shapes. 幾何學是對形狀的研究。

Length is a unit of measurement. 

長度是測量的單位。

The students are learning how to measure length. 

學生們正在學習如何測量長度。

These students are enjoying using the playground equipment.

這些學生正在享受使用遊樂場設備的樂趣。

Playground equipment includes swings, slides, monkey bars, and climbing pipes.

遊樂場設備包括鞦韆、滑梯、單槓和攀爬管。

This student is practicing his ball control. 

這位學生正在練習控球。

In a basketball game, ball control is very important. 

在籃球賽中，控球是非常重要的。

The students are doing their stretching exercise. 

學生們正在做伸展運動。

Stretching helps muscles and joints stay healthy. 

拉伸有助於肌肉和關節保持健康。

These students are practicing to rollerblade. 

這些學生正在練習溜直排輪。

Rollerblading can be for fun and also for exercise. 

溜直排輪可以純粹是為了好玩，也可以作為運動。