multiple tracks

例句：

1. 1. The movie has a multi-layered plot that keeps viewers engaged.
   这部电影有一个多层次的剧情，让观众保持兴趣。
2. 2.The store offers a wide range of products for customers to choose from.
   这家商店为顾客提供了广泛的产品选择。
3. 3.The project involves multiple teams working together to achieve a common goal.
   该项目涉及多个团队共同努力实现共同目标。