1771, "to draw a line under," from under + score (v.). The figurative sense of "to emphasize" is attested from 1891. Noun meaning "a line drawn below (something)" is recorded from 1901.
实用例句
1. The Labor Department figures underscore the shaky state of the economic recovery.
劳工部的数据进一步印证了经济复苏状况的不稳定。来自柯林斯例句
2. He is interested in the spirit of the play, and he is not averse to throwing in an anachronism or two if he thinks it will help underscore a point.
