英语语法分析

A large, valved, brass wind instrument with a bass pitch.

大型带活塞的低音铜管乐器。

Ostracodes are small animals, most of which have a two valved shell.

介形虫是小型动物，其中大部份都具有两瓣的外壳。

To investigate factors affecting calcium content in aortic valved homograft tissues in rats.

目的研究同种带瓣主动脉移植后影响供体组织钙含量的因素。