音标：[ˌkælkjəˈleɪʃən ɔv ˌvedʒiˈteiʃən ˈkʌvərɪŋ ˈreiʃiəu] ；

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Jana: You mentioned snow. I had no idea it snows in South Africa. Peter: Yeah, maybe I should qualify that. The central part of South Africa actually there's a range of mountains that run straight through from the northern part of South Africa right

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China's sex ratio is quite worrying nowadays. According to census data, China's sex ratio at birth was 108 males to every 100 females in the early 1980s, only slightly above the natural rate of 103 to 107. In 2000 the ratio was 116.9 males to 100 fem

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