The flow rate, perforation radius and shot density are the key parameters influencing the pressure drop across gravel pack.
分析结果还表明，油井产量以及射孔孔径和孔密度是影响砾石层压降的重要因素。
When I'm walking a drop shot, I prefer to drag my sinker slowly across the bottom with short pulls to make certain the bait stays above the bottom.
当我拖晃一个倒钓钓组的时候，我比较喜欢慢慢拖回来，保证铅在水底，饵则处于离底的状态。
I always fish a drop shot with a slight bow in my line, but I really keep the rod shaking to a minimum.
我总是在玩倒钓的时候保持钓线的半弯曲状态，并且将钓竿的的晃动幅度控制到最小！
Adopting teaching experiments and statistics, this essay makes a comparison between the new method of how to teach obverse drop shot and the traditional one.
本文采用教学实验及教育统计的理论和方法，对排球正面扣球技术程序教法与传统教法进行对比研究。
The balding Sampras proceeded to break his opponent's serve and then moved 4-2 ahead courtesy of a delightful drop shot.
谢顶的桑普拉斯继续破掉了对手的发球局并用漂亮的网前球一度以4 - 2领先。
Basic shots include the backhand and forehand chops the backhand and forehand drives the backspin chop the block shot the drop shot the smash the cross shot and the half volley.
基本打法包括：反手和正手削球，反手和正手抽球，削下旋球，推挡，吊球，扣杀，斜线球和快拨。
Basis shots include the backhand and forehand chops the backhand and forehand drives the backspin chop the loop the block shot the drop shot the smash the cross shot and the half volley.
基本打法包括：反手和正手削球、反手和正手抽球、削下旋球、弧圈球、推挡、吊球、扣杀、斜线球和快拨。
To hit a good drop shot one needs a good slice or underspin shot. A drop shot is really nothing more than an underspin shot that lands short or close to the net.
要放好小球需要有好的切削球或下旋球技术。小球只是离网更近更短的下旋球。
To hit a good drop shot one needs a good slice or underspin shot. A drop shot is really nothing more than an underspin shot that lands short or close to the net.
要放好小球需要有好的切削球或下旋球技术。小球只是离网更近更短的下旋球。
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