Fluormica
氟云母
??? 情景例句
Richard is a real Stewart. Richard
是個(gè)典型的Stewart家后代。
How did you do it?
你是怎樣達(dá)成它的？
He did a lot of research and travelled around the USA looking for information about his ancestors.
他做了大量的研究，在美國(guó)跑了許多地方，了解有關(guān)祖先的情況。