循序渐进in sequence;step by step;to make steady progress incrementally

言行一致practice what they preach

养儿防老(of parents) to bring up children for the purpose of being looked after in old age

咬牙切齿gnashing one’s teeth;displaying extreme anger;fuming with rage between gritted teeth

义不容辞be duty bound

一帆风顺smooth sailing (lit. single sail;gentle wind)

一见钟情to fall in love at first sight

衣锦还乡to return in glory (lit. to come back to one’s hometown in silken robes)

一举两得kill two birds with one stone (lit. one stone kills two birds)

一鸣惊人become an overnight success