China began building the system in the 1990s.

中国从 20 世纪 90 年代开始建立这一体系。

The company told the Reuters news agency that a team of 20 people built the system in about a month.

该公司对路透社表示，一个由20人组成的团队用一个月左右的时间建成了这个系统。

So we built this system in response to some requests to help augment the contact-tracing systems.

因此， 我们响应一些请求构建了这个系统，以帮助增强接触者追踪系统。

And we've already started building prototype systems in our lab.

我们已经开始在我们的实验室中构建原型系统。

We've had conversations in the US, Europe, India, the Middle East, about building hyperloop systems in the next 10 years.

我们在美国、欧洲、印度、中东就未来 10 年建设超级高铁系统进行过对话。