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- Study shows that the T3-J1 radiolarian cherty strata will be made such a potential target in the not too distant future. 过去未将此类地层列入勘探目标，研究认为此类地层将会成为一个潜在的油气勘探目标。
- cherty strata 硅岩地层
- 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。
- 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。
- Chert Jie is looking at some picture. 教师引导学生看主情景图。
- The clasts of the Jurassic strata,particularly the stromatolite-bearing,cherty limestone and purple quartzite,can be correlated with those in the footwall of the fault. 侏罗系地层中的砾石，特别是其中的含叠层石硅质灰岩和紫色石英岩，可以与断裂下盘的岩石相对比。
- 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。
- Any of various hard,dark-colored rocks,especially basalt and chert. 暗色岩一种坚硬、暗色的岩石，尤指玄武石及燧石
- 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。
- The sediments in this photo curve near the ends of chert pods. 这沉淀物在这幅图片的曲线近似冷凝物的黑矽石的扁豆形矿体。
- Tramps are from the lowest stratum of society. 流浪汉来自社会最下层。
