这是在冬天时能成功防御疾病的有效健康产品，我每天接触很多人，但是从来没有生病过。

This has been very successful in preventing illness this winter. Working in a health care field, I contact may people each day, and have not been ill yet.

youdao

这是在冬天时能成功防御疾病的有效健康产品，我每天接触很多人，但是从来没有生病过。

This has been very successful in preventing illness this winter. Working in a health care field, I contact may people each day, and have not been ill yet.

youdao