The XRD patterns of both the samples were well indexed to the standard cubic CsPbBr3 phase, with no observable secondary phases。个人理解:with no observable secondary phases 有种补充说明的意思,难道是啥补充状语?
...ammar.com/q-6600.html )里说道:表街名、广场名、公园等的专有名词前不用冠词。又如:Wall Street 华尔街、Tian’anmen Square 天安门广场、Hyde Park 海德公园。那请问下面这题呢?表示博物馆的专有名词前要加冠词吗?I'll meet you ...