Arsenolamprite
自然砷铋
🗣️ 情景例句
Blackjack.
二十一点！
How much paint did you want to order?
你要订购多少油漆？
suggested an idea on which he had been working for many years to the British Government and industrial circles.
他向英国政府和工业界提出了他研究多年的一项计划。