Lehmannite
铬铅矿
🗣️ 情景例句
What is your regular practice concerning the terms of payment?
你们一般采用什么付款方式？
What do you think will be a fair price for your product?
你认为你们产品的价格公平吗？
In 1858, a French engineer, Aime Thome de Gamond, arrived in England with a plan for a twenty-one-mile tunnel under the English Channel.
1858年，一位名叫埃梅。托梅。德。干蒙的法国工程师带着建造一条长21英里、穿越英吉利海陕的隧道计划到了英国。