Underneath the surface, the ice can be thick or thin.
表面之下，冰或厚或薄。
Wipe the surface very thick, use high-grade cement mortar, high strength, this is wrong.
面层抹得很厚，用上高标号水泥，高强度砂浆，这就错了。
A flexible pavement has a wearing surface which is often only 5 cm thick.
柔性路面的磨耗层往往只厚5厘米。
A flexible pavement has a wearing surface which is often only 5 cm thick.
柔性路面的磨耗层往往只厚5厘米。
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