Interfaces in composites, often considered as surfaces, are in fact zones of compositional, structural, and property gradients, typically varying in width from a single atom layer to micrometers.

复合材料的界面，常常被看成是表面，实际上是许多的组成、结构和特性组分，其厚度从单原子层到数个微米不等。

youdao

This method was very effective as the glass had not touched any surfaces between being soft and becoming hard, so it stayed perfectly unblemished, with a "fire finish".

这个方法非常有效，因为玻璃在从软变硬的过程中并没有触及任何物体的表面，因而在经过“火抛光”处理后能保持完美无瑕。

youdao

Then, as blazing sunshine alternated with drenching rains, the harsh, barren surfaces of the black rocks slowly began to soften.

然后，随着炽热的阳光和滂沱的大雨交替出现，黑色岩石粗糙而贫瘠的表面开始慢慢软化。

youdao

Temperatures across the UK on Tuesday range between 0C and 4C but forecasters said sleet and snow could result in icy stretches overnight into Wednesday as surfaces froze under them.

BBC: UK weather: Travel disruption after fresh snow

But as more information surfaces, the picture of what happened between Martin and Zimmerman becomes more complicated.

CNN: STORY HIGHLIGHTS

The winners will be projected on the walls of the parking lot on Saturday evening, illuminating most surfaces as well as the neighbouring building.

BBC: Possibly the world��s first GIF fest