A : Wait! I smell a rat!
等等！我感到有点不对劲。
B: What? Oh, we are in the wrong classroom!
什么，哦，我们走错了教室。
1. 解释
Smell a rat中的rat是指“老鼠”。老鼠在人们心中是个鬼鬼祟祟的样子，如果你问到了老鼠的味道，你会感觉到恶心，心里发毛，同时还可能想你的东西是否被他咬过。这种感觉和俚语中的smell the rat的意思相近了，意思是“让人觉得不对劲”“发觉可疑”“感觉事情蹊跷，不对劲”。其英文解释为：to suspect that something is wrong; to sense that someone has caused something wrong。
2. 例句
e.g. Why are the police looking for me? I smell a rat.
警察为什么在找我?我觉得事有蹊跷。
e.g. The old man would probably smell a rat if he were to claim them now.
马上去要，恐怕老头子多心。
