Bismutite
泡铋矿
🗣️ 情景例句
Well, what's going on?
噢， 怎么啦？
Americans wonder what has become of the idealism of the last decade.
美国人的理想主义，不知道在这十年间变得怎样了。
Oil rigs have to be repaired frequently and divers,who often have to work in darkness a hundred feet under water,
钻井平台需要经常修理，潜水员常常要在水面100英尺以下摸黑工作，