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

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

We were searching for something more recession proof and in line with community service.

我们曾寻找经济衰退的理由与社区服务的关系。

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