基本解释粗晶生铁英汉例句双语例句The results show that the microstructure of the cast iron without being RE modified is mostly coarse-grained austenite and network carbides at the grain boundary.结果表明，未经稀土变质处理的铸铁组织大部分为粗晶粒奥氏体，还有分布于晶界的网状碳化物；coarse-grained iron更多例句