这是因为从猫和狗那里接触过敏原，能够增强人们的免疫力。

It is thought that exposure to allergens - from cats and dogs - could boost the immune system.

youdao

到6至7岁时，这835名儿童中，过半的人都有各种各样的过敏症，对常见的过敏原如尘螨，豚草和猫等产生过敏。

At six to seven years old more than half of the children were evaluated for their sensitivity to common allergens such as dust mites, ragweed and cats.

youdao

就是举家回迁的那天，也许是因为回家的激动，也许是因为原遭环境时常变化的恐惧，我们家的猫跑丢了。

It was that day on which my cat ran away. Maybe it was because of the excitement of coming home, or the fear of frequent changing of the nearby environment. He ran away anyway.

youdao