bring up,bring down ,bring about,bring in的意思和区别

ing sb up ：（常用被动语态）抚养（长大）；养育,教养He was brought up by his aunt . 他是由姨妈养大的.She brought up five children . 她抚养了五个孩子.bring down ：减少,降低；使（飞机）着陆；击落We aim to bring down the price on all our computers . 我们打算降低我们所有计算机的价格.Twelve enemy fighters had been brought down . 有十二架敌机被击落.The pilot managed to bring the plane down in the field . 飞行员设法将飞机降落在了一处田里.bring sth. about ：导致；引起What brought about the change in his attitude ? 是什么是他改变了态度? bring in ：引入；引进；赚得；提出bring sth. out ：使显现；使表现出来；生产；出版上面那句话,我觉得时态有点问题（introduce、he show ）我是这么翻译的：经理向顾客介绍完产品后,他就带他到外面看看.