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- There are Middle|Lower Devonian Sanhuokou Group and Middle|Upper Proterozoic Bikou Group in the ore district. 矿区出露中下泥盆统三河口群和中上元古界碧口群。
- Ding Zhenju, Liu Congqiang.Ancient hydrothermal system in Bikou Group: Evidence from REE characteristics of iron-rich siliceous rocks[J].Progress in Natural Science, 2000, 10(5) :427 - 434. [7]丁振举;刘丛强.;碧口群古热水系统发育的富铁硅岩稀元素地球化学证据[J]
- Petrochemical, microelement, rare-earth element data and the character of bimodal volcanic rocks show that the Bikou Group strata were formed in an island arc-rift valley geote ctonic environment. 岩石化学、微量元素和稀土元素等一系列图解，都一致判别为碧口群火山岩主要是钙碱系列，也有少量的拉斑系列，并具双峰式火山岩特征。因此，认为碧口群可能形成于岛弧裂谷环境。
- Volcanic cycles of the Bikou Group and their tectonic implications 碧口群火山旋回及其地质构造意义
- NEW STIPULATION OF THE AGE OF BIKOU GROUP IN NORTHWEST SICHUAN 川西北“碧口群”时代的新厘定
- Neoproterozoic Bikou Group rift-related volcanic rocks 新元古代碧口群裂谷火山岩
- Education should not be restricted to any one specific age group. 教育不应限制在任何特定的年龄组上。
- He broke away from that lawless group years ago. 他在几年前脱离了那个非法团体。
- The group of barbaric soldiers killed many people. 那群野蛮的士兵杀了很多人。
- The group was made up of doctors. 这个团体是由医生组成的。
- A group of boys dashed out of the classroom. 一群男孩子从教室里冲出来。
- I come upon a group of children play in the street. 我遇到一群孩子在街上玩耍。
- He goes about with a group of nice boys. 他经常和一群好孩子在一起玩。
- He is a the most brisk young man in this group. 他是这个小组中最活跃的年轻人。
- He showed me a photo of a family group. 他给我看一张合家欢的照片。
- The chief accountant of a manufacturing group. 一个制造业集团的总会计师。
- The hunting group had good sport today. 今天打猎小组满载而归。
- I stand out in a group interview. 在集体面试中脱颖而出。
- He looked around the small group of mourners. 他环顾一下那一小群的送葬者。
- The group of destroyers damaged the bus. 那群破坏者毁坏了这辆公共汽车。
