We have every reason to cancel the contract because you've failed to fulfil your part of it.
我们完全有理由取消合同,因为你们没有完成应遵守的合同内容,履行合同。
but a medicine that had worked so well in one form of illness would surely be of equal benefit in another,
只知道一种药对一种病有好处,肯定对另一种病也会有好处。