It happens to you all the time. You're mid-sentence during a meeting with your boss, working on The New York Times' crossword puzzle, typing up an essay for grad school, or even talking to your mom on the phone -- and the next word you're looking for just doesn't ... come. 

这种事在你身上时有发生：在会上和领导正说着一半话，正玩着《纽约时报》上的字谜游戏，写着毕业论文，甚至和你妈在讲电话时，却忽然忘记要说什么了……

There's a scientific term for this totally common phenomenon, which we like to call a "brain fart." "Brain fart" is used to refer to a temporary mental lapse or failure to reason correctly. 

这种非常普遍的现象有个学名，我们称之为“大脑短路”。"大脑短路"是指暂时的大脑失灵，无法正确地进行推断。