presumption

The presumption is that the thief had a key to the store.人们推测窃贼有商店的钥匙。

There was a widespread presumption that she would appoint him as her successor.人们普遍猜测她会指定他为接班人。

the presumption that all students learn in the same way所有学生学习方式具有同一性的推测

Thousands of people used this drug on the presumption that it was safe. [=they used it because they believed that it was safe]成千上万的人都认为这种药物是安全的，所以都在使用。

The trial was unfair from the beginning because there was no presumption of innocence.审判从开始就是不公正的，因为没有无罪假定。

a defendant's right to a presumption of innocence被告的无罪假定权利

You don't know anything about my situation, and yet you have the presumption [=(more commonly) gall, nerve] to tell me what to do!你根本不了解我的处境，却敢对我讲该做什么！