您要查找的是不是：
- unconformable strata 不整合地层
- cover of unconformable strata 不整合盖层
- We can follow the history of life through the strata. 我们可以通过这一层层的地层跟踪生命的历史。
- These deposits are in unconformable contact with the underlying coal-bearing strata of the Shahezi Formation. 矿床与下伏沙河子组煤系地层呈不整合接触。
- They represent each society stratum. 他们代表各个社会阶层。
- The older strata gradually disintegrate. 较老的岩层渐渐风化。
- The older strata gradually disintegrated. 年代较久的地层逐渐崩解了。
- They do not constitute a separate class or stratum. 知识分子和青年学生并不是一个阶级或阶层。
- These strata, lying apparently in contact, are in fact abysmally separated. 这些表面上相触的地层实际上相隔很远。
- To expose(rock strata)by erosion. 剥蚀因腐蚀而露出（石层）
- He hates the privileged stratum. 他憎恨特权阶层。
- They belong to the rich strata and never work. 他们属于富裕阶层，不干活。
- They represent all social strata . 他们代表各个社会阶层。
- To expose(rock strata) by erosion. 剥蚀因腐蚀而露出（石层）
- There are several social strata in the town. 镇上有几个社会阶层。
- This is a stratum we must win over. 这一阶层，我们是必须争取的。
- Tramps are from the lowest stratum of society. 流浪汉来自社会最下层。
- Mineralizer was of host strata origin. 矿化剂硫源自赋矿地层；
- He applied for transfering because of unconformable the current work. 由于不适应目前的工作,他提出了调任申请。
- Is The Intermediate Stratum Forming in China? 中国的中间阶层正在形成?
