n.刺激物；刺激剂
adj.刺激的；刺激性的
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.)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。
adj.减轻刺激的；缓和的
