But over time they turned into cushions .

然而时过境迁，安全网变成了安全垫。

It also works as insulation and cushions us from knocks and falls .

这一层也可以作为我们摔打时的隔离层或缓冲垫。

If your knees are up off the ground , place some support cushions underneath .

如果膝盖不着地就垫些什么。

Getting really state of the art trainers with air cushions on the bottom doesn 't mean that you are actually running .

达到艺术训练员躺在空气垫上的状态不意味着你正在跑步。

As for couch cushions , don 't just flip them-swap them with one another so they don 't become molds of your family 's backs and butts .

至于沙发垫，不要只把它们翻过来就算了事，相互交换一下，这样它们就不会成为你家人背部和屁股的模型了。