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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·Most Roman pottery is light and smooth to touch and very tough, although, like all pottery, it shatters if dropped on a hard surface.

大多数罗马陶器轻巧而光滑，摸起来很硬，但像所有的陶器一样，如果掉在坚硬的物质上就会碎裂。

3·The hard surface is one key factor of urban heat effect.

硬化路面是城市热环境效应影响因素中较为重要的一个因素。

4·Applied on all resilient floor and hard surface which need to wax.

所有需要打蜡的弹性或硬质地面。

5·It made it more slippery with the sand on top of the hard surface.

由于赛道表面有很多沙子，显得比较滑。

6·Cleaning hard surface can first be sprayed on a soft cloth to wipe.

清洁硬质材料表面可以先喷洒在软布上再进行擦拭。

7·The hard surface was wrapped milk mango cake, and enjoy a different flavor.

被芒果包裹的硬面鲜奶蛋糕，享受另外一种风味。

8·Understanding polygonal subdivision and how it relates to hard surface modelling.

了解多边形细分及其与硬表面建模的关系。

9·The balcony is between 13 and 19 feet high and the runner landed on a hard surface.

阳台距离地面约13-19英尺（4-6米），万吉鲁跳下后摔在了水泥地面上。

10·Siemens FLD gear Units: Chinese standard of hard surface gear unit origins from FLD standard.

西门子弗兰德减速机：中国硬齿面减速机的标准源于弗兰德。