单词	pyramid
释义	pyramidpyramid /ˈpɪrəmɪd/ ●●○ noun [countable] Etymology ETYMOLOGYpyramid Origin: 1500-1600 Latin pyramis, from Greek 1 math, geometry a solid object that has a four-sided base, and four sides made up of triangles that slope to a point at the top2social studies, history a large stone building in the shape of a pyramid, found especially in Egypt and Central America3[usually singular] a system or organization in which a small number of people have power or influence over a much larger number of people:  The uneducated poor are at the bottom of the social pyramid.4a pile of objects that have been put into the shape of a pyramid: pyramid of a pyramid of cans—pyramidal /ˌpɪrəˈmɪdl◂/ adjective
随便看	yech yell yellow yellow card yellow fever yellowish yellow jacket yellow journalism yellow pages yellow ribbon Yellow River, the Yellowstone National Park yelp Yeltsin, Boris Yemen Yemeni yen yeoman yep yer Yerevan yes yeshiva yes-man yes/no question

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