It's a working mockup of a modular unit that can fit into a spacecraft.

这是一个可以装进宇宙飞船的模块模型。

They began by building the skeleton of the modular units.

他们首先构建模块化单元的骨架。

Cross-laminated timber was also used for the  elevator cores and to make the hotel rooms, that are formed with individual modular  units stacked on top of each other.

交叉层压木材也被用于电梯核心筒和酒店客房，这些客房由相互堆叠的独立模块化单元组成。