Playing basketball is one form of physical exercise. 打篮球是体育活动的一种形式。
free adj. 免费的
The government supplies free books to schools. 政府为学校提供免费的书本。
This service is free of charge. 该服务是免费的。
free adj. 自由的，不受束缚的
After ten years in prison, he is a free man again. 他坐了十年监狱，又成了自由人。
French n. 法语
I want to study French. 我想学习法语。
frozen adj. 结冰的，冻硬的
We were playing on a frozen lake. 我们在结冰的湖面上玩。
