Hydrohausmannite
水黑锰矿
🗣️ 情景例句
Well, that's what I do.
是啊 ，我正是这么做的。
Do you often learn geography on the weekend?
你常常在周末学地理吗？
who produced it with a flourish and pointed out a microscopic 'o' beside the time of the arrival of the train at his station;
站长拿着时刻表一挥手，指着那趟列车到站时刻旁边一个很小的圆圈标记。