Penfieldite
六方氯铅矿
🗣️ 情景例句
I think you ought to
我觉得，你们应该
Please keep the cartons to 15kg each and metal-strap all cartons in stacks of 4.
请将每个纸箱重量限制在15公斤内，并将每4箱一组用铁条儿固定起来。
There are some books on the stereo.
音响上面有几本书。