useful mineral造句

例句与造句

1. Britain had many rivers , which were useful for transport but also for water and steam power . britain also had useful mineral resources
   英国许多河流不仅用于交通，还提供水力及蒸汽动力。英国还有可用的矿产资源。
2. It's difficult to find useful mineral in a sentence. 用useful mineral造句挺难的