他最新的发明是一个以19世纪思想基础上的发电机——一类异常高效的发动机——尽管从未流行起来。
His latest invention is an electrical generator based on a 19th-century idea-an unusually efficient kind of engine, called a Stirling engine-which never caught on.
19世纪，人类成功从石油中提炼出煤油，煤油代替了鲸油，使得许多鲸类免受灭绝的厄运。
Kerosene refined from such petroleum helped displace the whale oil that lit lamps in the 19th century and led to the near extinction of many whale species.
考古队称现场的碎片规格、形状十分类似17世纪的小型金属枪。
The team said that the size and shape of the pieces looks very similar to the small iron guns of the 17th century.
应用推荐