We choose which direction we want to aim for, you know, which point of the sphere we want to aim at.

需要把目标定在一个方向上，需要把目标定在球上的某个点。

youdao

A two-dimensional model of such a universe would look like a sphere. It's impossible to have parallel geodesics (straight lines on a curved surface) — the two lines will cross at some point.

这样的2维宇宙模型就像是球体，不可能出现平行的测地线(测地线是曲面上的直线)——两直线必然在某点相交。

youdao

The other way to think about it is at this point, 1 well, rho is equal to one because you are on the sphere.

另外一种想法是从这个点出发，因为在球面上，所以ρ是。

youdao

This was a strange shift from political blogging, a sphere in which point-counterpoint is simply taken for granted.

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It says that if in this space any closed-curve object, such as a rubber band, can be shrunk to a point, then the space is topologically equivalent to a sphere.

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If and when face-recognition technology improves to the point where surreptitious cameras can routinely recognise individuals, privacy, as it has existed in the public sphere, will in effect be wiped out.

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