传送的

Can be widely used in engraving all kinds of nonmetal materials.

适用于多种非金属雕刻，用途十分广泛。

He expanded on this theory, known as monetarism, by studying years of American monetary policy.

他通过多年对美国的货币政策研究，将他的理论进一步扩展，以货币主义理论为大家所熟知。