1. I’m specializing in differential and integral calculus.
   我正专攻微分学和积分学。
2. After studying differential calculus you will be able to solve these mathematical problems.
   学了微积分之后,你们就能够解这些数学题了。
3. Methods Urinary calculus were removed by ureteric lithotripsy with ureteroscope or mini-invasive percutaneous neral fistulation lithotripsy removed the urolithus.
   方法应用输尿管镜经尿道碎石或经皮肾造瘘碎石取出尿路结石。
4. Objective To explore the feasibility and safety for right hepatolobectomy accordinging to the unique clinicopathologic characteristic in right calculus of intrahepatic duct.
   目的探讨右侧肝内胆管结石独特的临床病理特点及施行右侧肝叶切除的可行性和安全性。
5. This paper presents a stochastic calculus approach to this problem, deduces formulae to calculate the preestimate time, gives some thoughts of concrete realization.
   本文提出了解决这一难题的随机分析方法，导出了时间预估值的计算公式，并给出了具体实现思路。
6. Results Most of the calculus could be found in the 4 (muscular layer of vesical) ,and 5th (in the outlet of ureter) stenostomia region of ureter.
   结果输尿管中下段结石以第四狭窄(输尿管进入膀胱壁外缘)及第五狭窄(膀胱壁内段)多见。
7. A large staghorn calculus is seen obstructing the renal peli-calyceal system. The lower pole of the kidney shows areas of hemorrhage and necrosis with collapse of cortical areas.
   图中可见巨大的鹿角样结石嵌顿于肾盂肾盏系统。肾下极可见出血坏死区域，伴有肾皮质萎缩。
8. In this case, a large "staghorn" calculus (so named because the prominent projections of the stone into the calyces resemble deer antlers) was present that filled up the pelvis and calyceal system.
   在这个病例中，有一个大的鹿角状的结石（如此命名是因为结石突入到肾盏内与鹿角很相似）填满了肾盂肾盏。

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