帮忙翻译下BBC文章Since 1999, researchers with the Elephant Listening Project have used an acoustic monitoring system to record elephant sounds in the African rainforest. They’ve learnt that elephants use infrasonic calls - calls too low in f
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![帮忙翻译下BBC文章Since 1999, researchers with the Elephant Listening Project have used an acoustic monitoring system to record elephant sounds in the African rainforest. They’ve learnt that elephants use infrasonic calls - calls too low in f](/uploads/image/z/5957197-61-7.jpg?t=%E5%B8%AE%E5%BF%99%E7%BF%BB%E8%AF%91%E4%B8%8BBBC%E6%96%87%E7%AB%A0Since+1999%2C+researchers+with+the+Elephant+Listening+Project+have+used+an+acoustic+monitoring+system+to+record+elephant+sounds+in+the+African+rainforest.+They%E2%80%99ve+learnt+that+elephants+use+infrasonic+calls+-+calls+too+low+in+f)
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