Well, that's a solid line. He can't cross it.

嗯，那是个实线，他不能穿。

The goal is for players to fit the blocks together to form solid lines inside a box.

目标是让玩家将积木组合在一起，在盒子里形成实线。

And when necessary, may cross the solid line to overtake.

必要时可越实线超车。

Yet how then can either the plane contain a line, or the solid a line or a plane?

然而，平面怎么可能包含一条线，或者实心怎么可能包含一条线或一个平面呢？

It’s just all solid lines, it’s a very clean image, and then you do all the shading with coloring.

都是实线，这是一个非常干净的图像，然后你用着色来完成所有的阴影。

They were used to outline figures to show boundaries just like you might use solid lines in a pencil drawing.

它们被用来勾勒图形以显示边界，就像您在铅笔画中使用实线一样。

He said China is willing to increase the supply of vaccines and other materials to fight the pandemic in Africa to help build a solid defense line for people's health.

他说，愿为非洲抗击疫情增加疫苗等物资供应，筑牢人民健康防线。