添

例句：

1. 1. The book has been added to the library's collection.
   这本书已经被添加到图书馆的收藏中了。
2. 2. We need to add more ingredients to make the sauce richer.
   我们需要加入更多的配料使酱汁更浓郁。
3. 3. The teacher suggested adding some music to the lesson.
   老师建议在课上加一些音乐。