A drilling technique whereby gases (typically compressed air or nitrogen) are used to cool the drill bit and lift cuttingsout of the wellbore, instead of the more conventional use of liquids.
空气钻井是一种钻井工艺，是指利用气体去冷却钻头和把岩屑举升出油井环空，而不是利用更常使用的流体。
2
Succulents will reproduce easily from cuttings, so keep your eyes out when wandering through your neighborhood, but remember to ask permission first.
肉质植物可以通过插枝很容易就再生，所以当你走过邻居花园的时候要小心，不过首先要得到邻居的允许。
3
The authors summary the effects of various kinds of diamond bits to cuttings logging and find out the method to improve cuttings logging quality of diamond bits effectively.