About the year 1740 a whitehaven mining engineer named spedding invented an illuminating machine called a steel mill . 大约在1740年,怀特黑文地方的一位名叫斯佩丁的煤矿工程师发明了一种叫做钢轮机的照明机器。
He was trained there as a mining engineer 他在那里被培养成一名采矿工程师。
And when i tried to go back to work as a mining engineer 然后当我想回去做采矿工程师时
And when i tried to go back to work as a mining engineer . . 然后当我想回去做采矿工程师时. .
And when i tried to go back to work as a mining engineer . . 然后当我想回去做采矿工程师时. .