It is not considered toxic, but is an irritant. 它被视为无毒，但是它是刺激物。
The noise of traffic is a constant irritant to city dwellers. 车辆的噪音对城市居民是永无止境的骚扰。
When a droplet strikes your eye, you respond by producing a copious flow of tears to try and wash the irritant away. 当这些水滴接近我们双眼时，我们的眼睛会条件反射地分泌出泪水试图洗掉这种刺激感。
用作形容词(adj.)
Try not to eat spicy, irritant or greasy food, and drink more water. 少吃辛辣、刺激、肥腻的食物，多喝水。
Wear protective clothing to avoid skin contact with irritant chemical. 穿上护身衣物，以避免刺激性化学品触及皮肤。
