这项研究结果支持了以往的研究：说明在幼儿期接触细菌能刺激免疫系统，预防过敏。

The findings support previous research which suggests that exposure to germs during early childhood can prime the immune system to prevent allergies.

youdao

这项研究结果支持了以往的研究：说明在幼儿期接触细菌能刺激免疫系统，预防过敏。

The findings support previous research which suggests that exposure to germs during early childhood can prime the immune system to prevent allergies.

youdao