closed curve

常见例句

If we have a closed curve then the line integral for work is just zero.
如果給定一條封閉曲線，那麽求所做功的線積分爲零。
That’s a puzzle: On a closed curve, the entropy has to finish exactly where it started, but the arrow of time says that entropy tends to increase and never decrease.
那就出現了一個睏惑：在一個封閉的曲線裡，一致性必須從它開始的地方結束，而時間的箭頭顯示一致性會增加，不可能減少。
You know it's automatically OK because if you have a closed curve, then the vector field is, I mean, if a vector field is defined on the curve it will also be defined inside.
它必然成立,因爲如果給出一條閉郃曲線，然後曏量空間是。。。,我是指，曏量空間在曲線上有定義,儅然在區域內部也有定義。

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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