英语语法分析

Objective:To make the cause of valvulopathy of senile patients understand clearly and reduce the misdiagnosis.

前言： 目的：明确老年人的心瓣膜病因诊断，减少误诊。

Purpose To research the application of Color Doppler Sonography in the diagnosis of senior degenerative valvulopathy.

目的：探讨彩色多普勒超声诊断老年性退行性心瓣膜病的临床应用价值。