The solid line shows the pressure.

实线表示压力。

A double solid line border.

双实线边框。

She has crossed that invisible but solid line.

她有过那无形而实在的体验。

Use solid line and solid plane for Boolean calculating.

实体线、实体面，一般用来执行布尔运算。

The road ahead was barred by a solid line of policemen.

前面的道路被一队警察严严实实地把守住。