Redledgeite
硅镁铬钛矿
🗣️ 情景例句
He appeared ill at ease at the party.
他在宴会上显得很拘谨。
Goodbye. Thanks again for everything.
再见了，再次感谢你所做的一切。
Fortunately, however, ancient men made tools of stone, especially flint,
然而， 幸运的是，远古人用石头制作了工具，特别是用燧石，