Langbanite
硅酸锰锑铁矿
🗣️ 情景例句
This is a rough group.
这是一群粗野的孩子。
I'm feeling under the weather.
我觉得不舒服。
Indeed, we lack practice and experience nowadays in dealing with primitive conditions.
确实，我们今天缺乏对付原始环境的实践和经验。