This shows that friction, or the rubbing of one substance against another, produces heat.

这个事实说明, 摩擦, 或者说紧密接触的两个物体的来回移动, 能够产生热量。

Whenever Apollo takes a step, the setae flatten to make close contact with the surface.

每当阿波罗迈出一步，刚毛就会平，与表面紧密接触。

The free edge of the tentorium is in close contact with the brainstem, which is the region that connects the brain and the spinal cord.

小脑幕的游离缘与脑干紧密接触；脑干是连接大脑和脊髓的区域。

Of course, we will eventually so go through the spectrum of industries and services that can be open with some distancing to industries where you need much more close contact.

当然，我会来到整个行业和服务领域，这些行业和服务领域可以重新开放，但你得在这些需要紧密接触的行业里与人保持一定距离。