"In today's world, encircling a big country impossible," says Rasgotra.
Rasgotra说:“在今天的世界舞台上,包围一个大国是不可能的。”
Active galaxies give off bright radiation from their cores, where gas heats up as it is compressed into a swirling accretion disk encircling the black hole.
活动星系从它们的核部发出明亮的光芒,在那里,气体被加热并压缩成一个漩涡状的圆盘,漩涡的中心便是黑洞。
A crescent Saturn appears nestled within encircling rings in this Cassini spacecraft image.
在这张卡西尼号的照片中,土星环紧贴着新月形的土星。
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