By this research,some data is obtained for the reseach of mechanisms about displacement in the oversized annular.
得到了不同情况下(井径扩大率、流量、液体流变性能等变化)"大肚子"环空段不同位置径向截面的流速曲线变化情况,为研究"大肚子"环空段的顶替机理提供了一定的数据资料。
During cementing operations, the major issue to be addressed is the displacement of drilling fluid by cement slurry.
固井作业中,首要解决的是注水泥顶替泥浆的问题。
By using the mathematical and physical methods,this paper presents the derivation of annular liquid laminar flow equation group in the process of slimhole cementing displacement.
通过数学物理方法 ,推导出了小井眼固井顶替过程中液体环空层流流动方程组 ,通过保形变换、数值差分等处理 ,成功地编制出了计算机运算程序 ,得出了液体环空层流速度场、流量场分布规律。
He was replaced by another player.
他已被别人顶替了。
Will you cover for John today, Jean?
琼，你今天能顶替约翰吗？
I'll find someone to fill in for you.
我去找个人来顶替你。
Can you fill in for Steve tonight as he's ill?
史蒂夫病了，今晚你能顶替他吗？
Who will double for the secretary while she is on holiday?
秘书度假期间谁愿意顶替她？
He substituted for the worker who was iii.
他顶替了那位生病的工人。
John's ill today, so will you cover for him, Jean?
约翰今天病了，吉恩，你来顶替他，行吗？
When his mother retired of her own accord on account of her illness, he took her place
他母亲自愿病退时,他顶替了她的工作
When one of the players on the team was hurt, another replaced him.
球队中一队员受伤时，另一个顶替他。
bleed a well down
用酸顶替井中存油并接触油层面
working as a substitute for someone who is ill or on leave of absence.
顶替请假或生病的人干活。
I've decided not to fill in for him.
我已经决定不顶替他的位置。
I sold myself for more than I thought I was worth," he added, attempting to smile;
我昨天去顶替了一个人的位置。
In ease of my absence, who will take my place?
要是我万一不能来，谁来顶替我？
expose a criminal, an impostor, a culprit, etc
揭露罪犯、 冒名顶替者、 犯错误的人等.
It may be, you think me an impostor.
您也许以为我是冒名顶替的。
Computer Simulation Research on Displacement Efficiency under Different Flow State
不同流态的顶替效率的数值模拟研究
After I leave, he will take over my duties for a week.
我离开以后，他会顶替我的工作一个星期。
