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...
这些大机构总是随意制定规定，而且说变就变。These large institutions make — and change—the rules to suit themselves.条约规定他们必须尊重其邻国的独立。The treaty binds them to respect their neighbour's independence.警察如果遵守这些规定的话，一年都活不了。A policeman would not...
A French-based pharmaceuticals company ran into cash-flow problems and faced liquidation.法国的一家制药公司陷入资金周转问题，面临清算的危机。the development of new pharmaceuticals新药的开发The companies are pouring trillions of yen into biotechnology ...
留一些血浆给重病号.Keep some blood plasma back for the serious cases.血浆是血液的液体部分，不包含各种细胞。The plasma is the liquid portion of blood that is free of cells .血浆蛋白的白蛋白部分意义最大.The albumin fraction of plasma protein is of the greatest sig...