如果宇宙的时空像球体表面一样正向弯曲，平行的光线就会交合在一起。
If the universe's space-time is positively curved, like the surface of a sphere, parallel beams would come together.
在球体表面上的一条直线，就是你可能画出的最大圆，就像是赤道或经度线。
And on the surface of a sphere, a straight line is the biggest possible circle you can draw.
在西太平洋中，星球地势起伏的对称受到破坏，那里的地球体表面受到抬升。
The symmetry of the planetary relief is broken in the western Pacific where the geoid surface is uplifted.
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