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...
He had left his wallet on the table, so I went after him.他把钱包忘在桌子上了, 所以我追去找他。Someone snitched my wallet!有人偷了我的钱包.At Brussels airport he fell victim to pickpockets who pinched his wallet.在布鲁塞尔机场，他被扒手盯上，钱包被偷走了。Someone has ...
Li Ying paired off with Liu Hua in a tennis doubles match.李英在网球双打中与刘华搭档.Mr Ying is one of those happy people who derive pleasure from helping others.英先生属于那种助人为乐的快活人。You may be sure that Li Ying has a finger in the pie.你可...
His letter in response to her request had contained a firm refusal.对于她的请求他在信中给予了坚决的回绝。His radicalism and refusal to compromise isolated him...他的激进主义与拒绝妥协使他受到孤立。Britain's refusal to sell Portugal arms in 1937 still r...
子弹嵌进了中士的腿里，使其股骨碎裂。The bullet lodged in the sergeant's leg, shattering his thigh bone.唯一的声响是冰层噼噼啪啪碎裂的声音。The only sound was the crackle of breaking ice.他在那次撞车事件中因头骨碎裂而死去.He died in the car collision with his skull fra...
China was the first country in the world to synthesize crystalline insulin, a bioactive protein.中国在世界上最早用人工方法合成一种有生物活力的蛋白质--结晶胰岛素.There are many amino acids that the body cannot synthesize itself.有许多种氨基酸人体自身不能合成。Etioplas...