There are children who are not worried about growing up. The next sentence is: you don't worry about growing up when you have seedlings. Children don't worry about growing up, and seedlings don't worry about growing up, which means: with children, you don't have to worry about growing up, and plants grow up with seedlings. Sentence is the basic unit of language use, which consists of words and phrases (phrases) and can express a complete meaning, such as telling someone something, asking a question, asking or stopping, expressing some feelings, and indicating the continuation or omission of a paragraph. There is a big pause between sentences. It should end with a period, question mark, ellipsis or exclamation point. In order to express the meaning clearly, commonly used sentences include two parts: one is who or what is said in the sentence (subject part); The other part is what the sentence says, how to say it or how to do it (predicate part).