把诗句补充完整，并按要求回答问题。
鸟
﹝唐﹞   白居易
                                                     
                                                     
读了“劝君莫打枝头鸟，子在巢中望母归”这句诗，你想到了什么？
                                            
                                            
                                            
用你自已的话说说这首诗的意思：