- 1.Oil pools are valuable underground accumulations of oil, and oil fields are regions underlain by one or more oil pools.
油藏是珍贵的地下石油堆积物，而油田是由一个或多个油藏所组成的地下区域。
dict.yoduao.com - 2.Their tectonic framework was basically underlain in early Pleistocene or late Pliocene.
它们现在的构造格局基本上是在晚上新世或早更新世奠定的。
dict.yoduao.com - 3.The nickel mineralization is contained in a layered basic massif surrounded and underlain by an archean gneiss complex.
此处镍矿化产于一层状基性岩块内，其四周和下面都为太古代片麻岩杂岩围绕。
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