These acute exacerbations frequently follow a head cold, exposure to smoke.

这常随感冒、多烟雾而急骤恶化。

youdao

These acute exacerbations frequently follow a head cold exposure to smoke.

这常随感冒、多烟雾而急骤恶化。

youdao

These acute exacerbations frequently follow a head cold exposure to smoke.

这常随感冒、多烟雾而急骤恶化。

youdao