This applies particularly to chemical industries, where chance discoveries play a much larger part than they do in physical and mechanical industries.

在这化学工业方面尤为突出。同物理和机械工业相比，化学工业中偶然发现的机会要多得多。

Societies for the encouragement of mechanical industries were formed, the investment of capital was sought, and indeed a few mills were built on Southern soil.

成立了鼓励机械工业的协会， 寻求资本投资，确实在南方的土地上建立了一些工厂。

As necessary to mechanical industry as steel and steam power was the great market, spread over a wide and diversified area and knit together by efficient means of transportation.

——与钢铁和蒸汽动力一样对机械工业来说必不可少的是巨大的市场，分布在广泛和多样化的地区， 并通过高效的交通工具连接在一起。