Quartzwacke
石英瓦克岩
🗣️ 情景例句
I have been talking to a group of salesmen
我一直在与一群推销人员谈话
Fortune is fickle.
天有不测风云，人有旦夕祸福。
A team of pot-holers recently went down the Gouffre Berger.
最近，一队洞穴探险者下到了高弗。伯杰洞里。