问答题A study published this week in the Proceedings of the National Academy of Science found that nouns actually take longer to spit out than verbs do, presumably because they require more thought to produce. In the study, researchers led by Frank Seifart, a linguist at the University of Amsterdam, and Balthasar Bickel, of the University of Zurich, analyzed hundreds of recordings of spontaneous speech from nine very different languages from around the world: English and Dutch, as well as several others from as far a field as Amazonia, Siberia, the Kalahari, and Tibet. They picked out and compared the spoken renditions of the nouns and verbs, focusing not on how long it took for each word to be spoken but on what was happening in the half-second preceding each word. That tiny window is informative: cognitive scientists have concluded that it takes the brain about that long to formulate its next word, which happens even as a current word or phrase is being spoken. Which is to say, the future word casts a shadow over the present one. And that shadow is measurable: the researchers found that, in all nine languages, the speech immediately preceding a noun is three-and-a-half-per-cent slower than the speech preceding a verb. And in eight of nine languages, the speaker was about twice as likely to introduce a pause before a noun than before a verb  either a brief silence or a filler，such as “uh” or “um”or their non-English equivalents. Seifart and Bickel think that this has to do with the different roles that nouns and verbs play in language. Nouns require more planning to say because they more often convey novel information. Seifart said that’s one reason why we quickly transition from nouns to pronouns when speaking. Listeners are sensitive to those tiny pauses before a noun, and interpret them as indicating that what follows will be something new or important.

However, a sentence can be a sentence without nouns or adjectives, but never without a verb, for the most part. Verbs are grammatically more complex than nouns but have less to reveal. When you’re about to say a verb，you’re less likely to be saying something new, so your brain doesn't have to slow down what it's already doing to plan for it. Oddly enough，the one language that doesn’t seem to pre-think its nouns as thoroughly as its verbs is English, Seifart and Bickel found. Although English speakers do slow down their speech immediately before a noun, they use fewer pauses beforehand, not more, when compared to verbs. “English is peculiar,” Seifart said. English is less useful than we might imagine for understanding what our speech has to say about how we think: “It can never be representative of human language in general,5, he said. 6tTo make claims about human language in general, we need to look at much broader array of them.” In recent years, scientists have grown concerned that much of the literature on human psychology and behavior is derived from studies carried out in Western, educated, industrialized, rich, democratic countries. These results aren5t necessarily indicative of how humans as a whole actually function. Linguistics may face a similar challengethe science is in a bubble, talking to itself. “This is what makes people like me realize the unique value of small, often endangered languages and documenting them for as long as they can still be observed，” Seifart said. “In a few generations, they will not be spoken anymore.” In the years to come，as society grows more complex, the number of nouns available to us may grow exponentially. The diversity of its speakers, not so much.