They were poking him with rulers, hitting him in the face with chestnut shells, and were making him out to be a cripple and a monster, by mimicking him, with his arm hanging from his neck.

有的用三角板打，有的把栗子壳向的头上投掷，说“废者”，“鬼怪”，还将手挂在项颈上装的样子看。

It's the same concept, but I've got to use this twisting movement of my thigh and legs.

原理一样的，只不过要用大腿和腿部的扭转力带动三角板型转向。

The set square helps me make sure the walls I build are straight and true, so that my corners form ninety-degree angles.

三角板帮助我确保我建造的墙直的和真实的，这样我的角就会形成九十度角。

Then I learned how to use the tools of masonry: hammers, chisels, the compass, and the set square.

然后我学会了如何使用石工工具：锤子、凿子、圆规和三角板。