When should you prune apple trees?

　　蘋(píng)果樹(shù)應(yīng)該什么時(shí)候剪枝？

　　She peeled and quartered an apple.

　　她削去蘋(píng)果皮，把它切成四瓣。

　　She munched on an apple.

　　她在大口啃蘋(píng)果。