be serious about什么意思?

be serious about什么意思? Please be serious about what you do.这句话中的serious什么意思?好像不是“严肃” be serious about diong about.=be serious about sth. be serious about do还是doing? be serious about doing sth是什么意思? 用（be)serious about有翻译 serious什么意思 serious什么意思? serious 什么意思 be enthusiastic about什么意思? be serious with/about有什么区别吗?有没有哪个接人 哪个接物的分别? I care about you This is really serious这句话中文什么意思 be serious about 和be interested in 有何区别 why so serious什么意思? why so serious什么意思 Why so Serious什么意思 NEED NOT BE SERIOUS是何意思? be puzzled about sth 什么意思