Until today germanium is the present substance on earth with no exception.直至今天锗才毫无异议地成为地球上是纯净的物质.Doped silicon and germanium are technologically the most important types of semiconducting material.添加硅和锗在工艺上是半导体物质中最重要的类型....
将煎蛋饼放在烤架下用文火烘烤，直到表面凝固。Place the omelette under a gentle grill until the top is set.做煎蛋饼并不难, 但有窍门.Making omelettes isn't difficult, but there's a knack to it.我们有很多种类的煎蛋饼,比如西班牙煎蛋饼, 西式煎蛋饼和墨西哥煎蛋饼.We have a variety ...