added return

例句：

1. 1. The company has added several new products to its line.
   该公司已经增加了几个新产品到其产品线中。
2. 2.We need to add more resources to our project to meet the deadline.
   我们需要为我们的项目增加更多的资源来满足截止日期。
3. 3.The teacher added some interesting facts about the history of the city to the lesson plan.
   老师在课程计划中加入了一些关于城市历史的有趣事实。