要建潮汐发电站，我们就需要建水坝。

To build a tidal power station, we need to build a dam.

youdao

关于建这个项目的成本，最主要的就是搭建教室，使之适应这种教学模式，我们需要两间能装170人，的教室来上这种课。

In terms of cost to institute this, the upfront cost to build classrooms, to accommodate this kind of structure, we need two classrooms that hold 170 students a piece to do this.

youdao

我们需要更多的空间来建它。

We need more Spaces to set up it.

youdao