OK, so the proof, so just going to prove that the line integral is path independent; the others work the same way.

那么这个证明，只需证出线积分与路径无关的，其它的也是用同样的方法。

youdao

What more proof is required that history moves in a straight line than the eclipse of every U.S. rival?

这便更充分地证实了他们的信念，美国的历史是沿着直线前进的。 任何对手在他的前面，只能变得暗淡无光。

youdao

Proof that every report item line is printed exactly once.

证明每一个报告项都严格只打印一次。

youdao

John Hannay, a theoretical physicist at Bristol University, believes he has come up with a three-line proof which shows beyond doubt that Dr Ardavan's mathematics must be flawed.

ECONOMIST: Physics

His own immigration-policy plans, framed as a national-security issue, were not different in any meaningful way from the compromise bill that consumed Congress this spring, except that he wanted every illegal resident to come forward for a tamper-proof identity card before getting in line for citizenship.

NEWYORKER: Mayberry Man

Normally, the two officers would be riding the Expo Line, checking passengers for proof of fare payment.

CNN: STORY HIGHLIGHTS