He needed a lever to work the stone out.

他需要一个杠杆撬开石头。

My master showed me how to work the stone carefully and patiently, and how to place the finished stone into position in a wall and set it in mortar.

我的师父向我展示了如何仔细耐心地加工石头，以及如何将完成的石头放置在墙上的适当位置并将其镶嵌在砂浆中。