它绕着自己的轴旋转;地轴是一条想像的穿过地球中央的、从北极到南极的线。
It turns around its axis, an imaginary line that goes straight through the middle of the earth from the North Pole to South Pole.
第十五个世纪欧洲知道,那天空由闭合的同心水晶球形做成,转动在中央地球附近和运载星和行星。
Fifteenth century Europeans' knew ', that the sky was made of closed concentric crystal spheres, rotating around a central earth and carrying the stars and planets.
采取这样的农业生产方式,以及把一些农场迁到邻近城市中央的地方,将对人类和地球都有利。
Both people and the planet would benefit by such treatment of agriculture and location of some farms in closer proximity to the city centers.
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