英语语法分析

AIM To study the diagnostic value of the imaging in the negative ureteral calculous.

目的探讨输尿管阴性结石的影象学诊断价值。

This paper shows the important roles of Variable Limited Function in Calculous through several examples.

通过示例，展现了变限函数在微积分中的重要作用及其应用。

Objective To discuss the importance of intraoperative cholangiography for calculous patients in the biliary tract without jaundice.

目的探讨术中胆道造影对无黄疸胆道结石病人的重要性。