单词	river dolphin
释义	river dolphin noun : any of various small, toothed whales (as of the families Platanistidae and Iniidae) that chiefly inhabit rivers of South America and Asia and have a rounded forehead and a snout elongated into a long beak Example Sentences Recent Examples on the Web Like agriculture, echolocation, and the river dolphin, the practice that would become effective altruism emerged independently in different places at around the same time. Gideon Lewis-kraus, The New Yorker, 8 Aug. 2022 But pink river dolphin populations are vulnerable due to factors including mercury pollution and river and lake contamination. Daisy Hernandez, Popular Mechanics, 26 Jan. 2022 Entries also captured moments between humans and animals, including an image of a Colombian biologist soothing an Amazon river dolphin and baby orangutans playing with a caretaker. NBC News, 1 Dec. 2021 One of them, the rare Indus river dolphin, has seen its numbers grow tenfold over the past half-century. National Geographic, 25 June 2020 Their list mainly included fish, but also mammals like beavers, river dolphins and hippopotami, as well as coldblooded creatures like crocodiles, giant salamanders and alligator snapping turtles. Rachel Nuwer, New York Times, 21 Jan. 2020 Small cetaceans such as the vaquita and various river dolphins successfully lived alongside human fishers for thousands of years in coastal waters, estuaries, and rivers. Virginia Morell, Science | AAAS, 11 Dec. 2019 The Gangetic river dolphins are effectively blind, and see with sound. Shreya Dasgupta, Quartz India, 21 Nov. 2019 During an expedition in the Sundarbans, Deen sees river dolphins washing up dead on the shore. Abhrajyoti Chakraborty, The New Republic, 8 Oct. 2019 See More Word History First Known Use 1870, in the meaning defined above
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