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- initial rate of penetration 初始钻速
- The total gas value rose from 0.02L to 0.03L as rate of penetration (ROP) got down to 2 min/m. 钻时降低至2分钟/米，全烃由0.;02升高到0
- The fireball ascended with great rapidity, the initial rate of rise being about a mile per second. 火球以很高的速度上升，上升的最初速度约为每秒1哩。
- The fltenotio arsery was dilated by percutaneous transluminal renal angioplagty (PTRA) using a balloon catheter. The initial rate of success wag 93% (13/14). 用经皮穿腔肾动脉成形术(PTRA)扩张狭窄的肾动脉,初期成功率为93%25(13/14)。
- Especially in nonresistant strata，in order to keep borehole wall stability we usually raise the drilling fluid density，but it seriously impede the rate of penetration. 尤其是不稳定地层，常常靠提高钻井液密度来保证井壁稳定，严重的制约了钻速的提高。
- For the research of the rate of penetration (ROP) prediction,the empirical or semiempirical equations of the ROP are derived from the laboratory or field data before. 在钻井机械钻速预测研究中,以前常根据现场数据或试验数据统计拟合得出经验或半经验方程,方程一般含有一些很难确定的系数甚至是不可靠的。
- Advances in polycrystalline diamond compact( PDC) bits have sharply increased rate of penetration( ROP),reduced drilling time and costs in oil and gas wells. 聚晶金刚石复合片（PDC）钻头的发展及应用，大大提高了钻井的机械钻速（ROP），减少了钻井时间，降低了钻井成本。
- The rate of penetration of PDC bits relates closely to its self-sharpening property.This relation can be tested through rig test which is performed with standard PDC test bit. 复合片钻头的钻速与其切削齿的自锐性密切相关,钻头台架试验反映了这种内在联系,并用平均钻速((?))和平均钻速变化率((?))等指标对复合片自锐性能进行描述与评价。
- What's the going rate of computer programmers? 计算机程序设计人员的一般工资是多少？
- After analyzing diversified forecast models for the rate of penetration, the ROP forecast method with BP arithmetic theory of improved artificial nerve nets was taken to calculate the ROP during drilling. 在对各种钻速预测模式进行分析的基础上 ,提出利用改进后的人工神经网络BP算法理论完成对钻井过程中机械钻速的预测
- By power we mean the rate of doing work. 我们说功率就是指做功的速率。
- Countries with both high and low initial rates of antidepressant use saw similar trends in suicides until SSRIs were introduced. 许多拥有或高或低的使用抗抑郁剂的人群的初始比率的国家在SSRIs被引入之后看到的是相差无几的自杀率。
- Excellent performance, with an initial rating of 180.6 teraflops and overall Linpack Benchmark efficiency of 77.5 percent. 优良的性能，初步评价的180.;6万亿次浮点运算和整体效率的Linpack基准百分之77
- KQC series of air hammers used in gas drilling can solve certain problems,such as lower ROP(Rate of Penetration) and well deviation,which occurred in mud drilling in above medium hard formation. 在油田气体钻井中使用KQC系列空气锤,解决了泥浆钻井在中硬以上地层中钻速慢、易井斜的难题。
- The rate of electrolyte seepage was smaller.Dissolubility sugar and proline content increased.These all strengthened the regulating ability of penetration, raised the anti-cold ability of the plant. 渗透调节物质可溶性糖、脯氨酸含量大幅度提高，增强了细胞的渗透调节能力，增加了植物组织束缚水的含量，由于增强了持水力，降低了冰点，从而提高了植株的抗冷性。
- The rate of incidence of a disease. 发病率发生疾病的概率
- The rate of inflation must be held down. 通货膨胀率必须控制在低水平上。
- The rate of pay was built into her contract. 工资率已写进了她的合同。
- The rate of growth was unprecedented. 这个成长率是前所未有的。
- The car was going at the rate of 60 miles an hour. 汽车以每小时六十英里的速度行驶。
