在做中学原则 Learning by doing
中原在线 zhongyuan-me
发丝在原野中飘散 Among the fields of gold
在原语中 In the original language
可在原料中加入成孔剂 porous former
在草原中图片 Kat in het veld
如何在原文中寻找答案 Locate Your Answer in the Passage
他在中原油田依然作事两年了。
He has being been very working in Zhongyun field for two years.
在中原油田，套管腐蚀损坏是油水井报废的主要原因。
Corrosion failure of casing in Zhongyuan oil field is a main factor that causes oil or water well abandoned.
在中原油田，测井阻卡是钻井施工中常遇到的现象之一。
Logging tool sticking often occurs during drilling operation in Zhongyuan oilfield.
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