Trichalcite
丝砷铜矿
🗣️ 情景例句
Stay ... stay.
再待一会儿……再一会儿。
Last year, he applied to Harvard University for a scholarship and succeeded in passing a difficult examination.
去年，他向哈佛大学申请奖学金并通过了一个很难的考试。
Don't be so childish.
别这么孩子气。