A high degree of soil variability in a small area is common, particularly within forests.
小范围内的高度土壤变异是很常见的，特别是在森林里。
Beds of this material, out of sight beneath the soil, are common.
由这些颗粒物质组成的地层很常见，通常位于土壤下方看不见的位置。
Have a common heart; Soil can become gold.
拥有一颗平常心；泥土也能变黄金。
The soil pollution by petroleum is a common problem in the world.
当今土壤的石油污染是一种较为普遍的现象。
The soil pollution by petroleum is a common problem in the world.
当今土壤的石油污染是一种较为普遍的现象。
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