我们相信，中国人将用大约十年的时间就能制造出大型飞机。

我们相信，中国人将用大约十年的时间就能制造出大型飞机。
I believe that we Chinese can produce large aeroplane in ten years or so.

Chinese people will use about ten years time will be able to manufacture large aircraft

你好~

We believe that the Chinese people will use about ten years time will be able to manufacture large aircraft.

或者

We believed that, the Chinese will use about ten years to be able to make the aerodreadnought.