Tetradymite
n. [矿]辉碲铋矿
🗣️ 情景例句
Practice tenses as much as possible.
操练各种时态。
Long time no see.
好久不见。
Ken gave up smoking two years ago. He'd been smoking for thirty years.
两年前肯戒了烟，之前他抽了三十年烟。