with obj.
1- draw a line under (a word or phrase) to give emphasis or indicate special type在（单词, 短语）下面画线。
1.1
- emphasize (something)强调; 突出：
the improvement in retail sales was underlined by these figures.
这些数字突出了零售量的增加。
1
- a line drawn under a word or phrase, especially for emphasis（尤指为强调）下划线。
2
- the line of the lower part of an animal's body（动物）下体轮廓。