我们在南美洲为一些大公司探测石油和矿石。We dowse oil and ore in South America for big companies.这机器每小时可以破碎多少吨矿石?How many tons of ore can this machine crush in an hour?他们从矿石中提炼出黄金.They refined gold out of the ore....
The betaine will collapse to the alkene only when these two functions are eclipsed.只有当这两个基团移至重迭位置时碘盐才能裂解为烯烃.The gramophone had been eclipsed by new technology such as the compact disc.激光唱片等新技术使留声机黯然失色。Our happiness was s...