Trichalcite
丝砷铜矿
🗣️ 情景例句
Summer is vacation time.
夏季是度假的好时机。
I graduated from Yale University 5 years ago.
五年前，我从耶鲁大学毕业。
Are you really going to retire, miss Marsh?
马什小姐，您真的准备退休吗？