n.怒气；生气

n.毛屑；头皮屑

The children get the teacher's dander up when they make a lot of noise. 孩子们大声吵闹使老师很生气。

One view is that allergies can develop as the result of childhood exposure to certain irritants, such as dust or animal dander, while the immune system is not yet mature. 一种观点认为，过敏之所以会产生，是由于人们在童年时期当免疫系统尚未成熟时曝露于某些刺激物之下，如灰尘或动物毛屑。