fights off

As for the claims to boost immunity, there is no evidence to whether it fights off the flu.

至于对提高免疫力的说法，也没有证据表明其是否能击退流感。

The human body is constantly bombarded with microbes, Dr. Zuk says, most of which the immune system fights off.

祖克博士说，人体时常会受到细菌侵扰，但人体自身的免疫系统会将大部分细菌击退。

Tanzanian villager fights off lion .

坦桑尼亚村民击退狮子进犯。

700-fill goose down insulation fights off bone-chilling temps.

700向下填充保温鹅战斗过刺骨的临时工。