They built the monorail and they created their own lake.
他们建造了单铁路,还创造了自己的湖泊。
While nothing like this has really ever been built before, these pods would, in effect, function like today's suspended monorails which do typically reach speeds of 80 to 100 kilometres an hour, just without a half-kilometre drop beneath them (source).
虽然以前从未真正建造过这样的东西,但实际上,这些吊舱的功能就像今天的悬挂式单列车一样,常可以达到每小时 80 到 100 公里的速度,而且下方没有半公里的落差(来源)。