Additionally, the entire microscope sits on air cushions to remove external vibrations.

，整个显微镜置于空气垫上以消除部振动。

Without this engine to form the motive power and the pneumatic tire to give it four air cushions to run on, the automobile would never have progressed beyond the steam carriage stage.

如果没有这种动机形成动力，没有充气轮胎为其提供四个气垫以供行驶，汽车将永远法越蒸汽车阶段。

So these are air cushions, essentially.

所以从本质上来说，这些是气垫。