You have 14 days in which you can cancel the contract and get your money back.

你有14天时间，在此期间你可以取消合同并收回你的钱。

《柯林斯英汉双解大词典》

I don't think I can cancel them.

我认为是没法退订的。

youdao

So, we can cancel something here.

我们可以消掉一些。

youdao

T1 I can cancel those, T2 and then I'm going to multiply through by T1.

然后乘以，所以这等于T2除以T1减。

麻省理工公开课 - 热力学与动力学课程节选

Linden Lab's rules now say the land is a service the company controls and can cancel.

CNN: Can people actually 'own' virtual land?

In some cases, the only way you can cancel is to call during the work week.

WSJ: Getting Going: The Financial Fear Mongers

And, of course, the Pentagon can cancel a contract if it is not fulfilled.

ECONOMIST: An unregulated and unsupervised semi-covert world