學(xué)個(gè)詞 Learn A Word:2242_circulate

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　　今天我們要學(xué)的詞是 circulate. Circulate 動(dòng)詞，意思是傳播。流感疫苗是如何研制的?Flu viruses constantly mutate, and the vaccine is changed every year based on what scientists see circulating. 流感病毒不斷變異，所以科學(xué)家每年都要根據(jù)眼下正在流行的病毒來研制疫苗。The University of Oklahoma is investigating a video circulating on social media allegedly showing members of a fraternity chanting racist language. 俄克拉荷馬大學(xué)對(duì)社交媒體上流傳的一段視頻展開調(diào)查，據(jù)悉視頻上顯示了該大學(xué)一個(gè)兄弟會(huì)成員高喊種族歧視的語言。好的，今天我們學(xué)習(xí)的詞是 circulate, circulate, circulate...