首先，避免所有可能的过敏源。

First of all, avoid all possible sources of allergy.

youdao

过敏源可能是大豆，牛奶或者可可。

IzChallengers may be soy, milk or cocoa.

youdao

过敏源可能是大豆，牛奶或者可可。

Challengers may be soy, milk or cocoa.

youdao

最有效的预防措施是避免接触过敏源。

The most effective method for allergies is avoidance.

youdao

培训人员，注意过敏源。

To train personnel in allergen awareness.

youdao

通常由一些过敏源引起，如：冷空气，运动及其他因素。

It is usually flared by allergens such as cold air, exercise, and other factors.

youdao

其治疗方式是藉由逐渐钝化过敏者免疫系统对于宠物过敏源的反应。

They work by gradually desensitizing a person's immune system to the pet allergens.

youdao

其治疗方式是藉由逐渐钝化过敏者免疫系统对于宠物过敏源的反应。

They work by gradually desensitizing a person's immune system to the pet allergens.

youdao