The table mats and coasters have a non-slip, soft green backing.
这些桌垫和杯垫下都有一层绿色防滑软衬。
《柯林斯英汉双解大词典》
2
Now, we'll slip the tinfoil between the disc and the plate glass top of the table showing that there is indeed a space, a thin film of gas between the disc and the glass upon which it's resting.
我把铝箔放到，底座和桌面间，说明中间，有间隙，底座压在一层很薄的气体上。
3
In this way, one is not beautiful, the two is the table when the screw is also easy to slip.