Methods: Peripheral t lymphocyte subpopulations were estimated by immunohistochemical method of alkaline phosphatase.

方法：用免疫组织化学方法检测循环血t淋巴细胞亚群。

youdao

The scientists said the locale was almost certainly a primordial lake bed, rich in clay minerals, where the water many eons ago wasn't too salty or alkaline for life to thrive.

WSJ: Scientists Say Microbial Life Was Possible on Mars