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.
One of the biggest deterrents was the estate agency fee for finding a rental flat.
最大的障碍因素之一是租房要交的中介费。
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