bring on
1．cause to arise or occur；cause to develop or advance 引起；发生；使发展
Living in damp surroundings may bring on rheumatism．生活在潮湿的环境里会引发风湿病的。
He has brought all the trouble on himself．麻烦都是他自找的。
The rain helped to bring on the crops．这场雨有助于农作物的生长。
2．serve（food）up；introduce （usu．on a stage）端上（饭菜等）；介绍（通常在舞台上）
She'll bring on our lunch right away．她马上把午饭端上来。
He brought on the guest speaker to the audience．他向听众介绍了请来的演讲人。