英语语法分析

Objective To observe the influence of different doses of astragalus in cats.

目的观察不同剂量的黄芪对猫正常血压的影响。

Scientists say astragalus boosts the immune system, but it isn't known if that translates to any health benefit.

科学家们说，黄耆能够改善人体的免疫系统，但还不清楚是否能够给人体健康带来好处。

One of the few Western studies on the immune-boosting properties of astragalus was published in 2007, using 16 human subjects.

在西方对黄耆提高免疫能力特性为数不多的研究当中，有一项2007年公布的研究，这是一个有16人参加的人体试验。