Sandstones are, as a rule , interbedded with shales.砂岩通常都与页岩互层.This paper presents the PDC bits with the satisfactory testing result in the multi - interbedded formation.介绍了一种复合式PDC钻头,该钻头在多夹层地层钻井施工中取得了较好的试验效果.A shale for...
We're dismal enough without conjuring up ghosts and visions to perplex us.用不着招神现鬼来缠我们,我们已够惨的啦.This problem is hard enough to perplex even the teacher.这个问题确实很难,以至于老师都迷惑不解.I have no wish to perplex the issue.我不想使问题复杂化...
Cramer spat an obscenity.克拉默愤愤地骂了一句脏话。Cramer reveals his Ten Commandments of Trading ( Commandment # 5 : Tips are for waiters ).克莱姆揭示了他的十个戒律的交易 ( 诫 # 5: 小费是侍应生 )....
He gave a dry laugh, then sat down and started on the pastries.杜新箨说着干笑一声, 坐下去就吃点心.The and Macanese pastries are ideal for snacks and - home gifts.地道的传统糕饼小吃深受欢迎,是游客的首选礼品.Salad fork: salads, fish, pies, pastries, and cold ...