英语中有这样一句口语：
put two and two together
这句惯用语还是很常用的，意思是
根据现有情况推论；综合判断
比如：
"How did you know they were having an affair?"
"I'd seen them out together a couple of times,
so I just put two and two together."
“你怎么知道他们有婚外情？”
“我好几次见到他们一起外出，所以就这么推断。”
不过上面那句口语并不是今天的“主角”
因为英语中还有句口语是：
put two and two together and make five
这种小学生都不会犯的错误的真正意思是：
错误地理解一个特定的情况，推断失误了
听风就是雨
比如：
"Why in the world did she think you were pregnant?"
"I was sick a couple of times, and I guess
she just put two and two together and made five."
“她究竟为什么会认为你怀孕了？”
“我曾呕吐过一两次，我猜她就这样想了。”
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