complementary
/ˌkɔmplɪˈmentrɪ; ˌkɑmplə`mɛntərɪ/ adj
~ (to sth) combining well to form a balanced whole 紧密结合成相称的整体
They have comple-mentary personalities, ie Each has qualities which the other lacks. 他们二人的性格可取长补短（各自有对方缺乏的性格）.
His personality is complementary to hers. 他的个性与她的相反相成. ,complementary `angle either of two angles which together make 90 余角（两角之和为90这两个角就互为余角）. ,complementary `colour colour of light which when combined with a given colour makes white light (eg blue with yellow) 互补色（混合後产生白色光的两种色光, 如蓝和黄）.