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1·Teeth have a hard surface layer called enamel.

牙齿有一层叫做釉质的坚硬表层。《牛津词典》

2·Nevertheless, astronomers still believed that when a comet approached the Sun—where they could study it—the Sun's intense heat would remove the corrupted surface layer, exposing the interior.

尽管如此，天文学家们仍然相信，当一颗彗星接近太阳时——这是他们可以研究它的地方——太阳的高温将会移除损坏的表层，露出内部。

3·The surface layer consists of oxide, sulphide and N, C compound.

表层由氧化物、硫化物和氮（碳）化合物组成；

4·I screamed in pain as the knife cut the surface layer of my skin.

我的皮肤被割开了，我痛苦的嘶叫着。

5·The filtration belongs to deep filtration or surface layer filtration.

这类过滤属深层过滤或表层过滤。

6·The portion of the current confined to the surface layer becomes negligible.

流经上部地层的那部分电流变得可以忽略不计。

7·If the fluid is agitated, the thickness of the surface layer become reduced.

如果液体被搅拌，则表层厚度将减小。

8·Microhardness on the surface layer were measured by microhardness testing machine.

利用显微硬度试验机来测量表面显微硬度。

9·This surface layer thickens at an early stage in a mouse after 8 days of development.

发育8天后，老鼠早期胚胎的，外胚层开始增厚。

10·The lacquerware is a variety of traditional crafts with lacquer on the surface layer.

通俗的讲，漆器现在多指表面上有一层漆的各种传统工艺品。