粘土沉积分布在古代的火山表面和坑坑洼洼的高原地区，其中一些显然是最近才由于侵蚀而暴露出来的。
The clay deposits are scattered all over, in ancient volcanic surfaces and heavily cratered highland regions, some of which have apparently been exposed by erosion only recently.
山是古代受侵蚀海底的遗作，上载着秀美竹林和水稻梯田。
The mountains are vestiges of ancient eroded seabeds that support graceful bamboo groves and terraced rice paddies.
证据显示，撒哈拉的古代海洋和河流中，砂岩小尖塔被降雨侵蚀。
Evidence of the Sahara's ancient seas and rivers, sandstone pinnacles were eroded by rainfall.
用含氟聚合物渗透加固保护古代砖质类建筑，提高文物的机械强度、抑制或减缓水对文物的侵蚀。
Penetration of fluorine polymer can be used to improve the mechanical strength, stop or slowdown the attack of water to ancient relics for protection of ancient brick-based buildings.
用含氟聚合物渗透加固保护古代砖质类建筑，提高文物的机械强度、抑制或减缓水对文物的侵蚀。
Penetration of fluorine polymer can be used to improve the mechanical strength, stop or slowdown the attack of water to ancient relics for protection of ancient brick-based buildings.
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