Much of this testing work happens unseen, deep within the constructors' factories and wind tunnel facilities.

很多的测试工作我们是看不到的，比如说在汽车制造工厂里以及风洞试验室里所做的测试工作。

youdao

An appraisal of the advances in wind tunnel test techniques can be readily obtained by comparing the modern wind tunnel facilities with their historical predecessors.

将现代风洞设备同其历史上的先驱相比较，很容易对风洞技术的进展情况作出评价来。

youdao

I can understand you can only have your wind tunnel turned on 12 hours a day but I can't understand how it restricts CFD facilities.

我能理解你只能每天用12个小时的风洞，但是我不能理解这项规则要怎么限制CFD设施。

youdao

Engineers who have assessed the project to build deep underground storage facilities feel it would be a bigger construction challenge than that of the channel tunnel, with tunnelling between 200 and 1, 000 metres.

BBC: Nuclear waste disposal: Where in Cumbria to bury it?