Chalcocyanite
铜靛石
🗣️ 情景例句
I have two days off a week.
我一星期休息两天。
She asked me which one I'd like, and I said I didn't mind.
她问我要哪一个，我说哪一个都没有关系。[动词时态一致，这是中国人学习英语最头痛的一个问题。]
The hovercraft travelled first over the water, then mounted the beach,
气垫船先是在水面上行驶，后又登上海岸，