Whereas attractants, repellents, and many incitants are olfactory substances , stimulants, and deterrents are usually gustatory.引诱剂, 排斥剂还是其他的兴奋剂都是嗅觉物质, 但刺激剂和阻抑剂常常是味觉物质....

deterrents的音标：...

n.制止物( deterrent的名词复数 )...