我们想当然地认为洁净水的供应无穷无尽而不予以珍惜。

We take having an endless supply of clean water for granted.

《牛津词典》

如今，我们想当然地认为它们是水平的条状植物群落。

Today we take for granted that they're horizontal bands of plant communities.

youdao

他想当然地认为自己能通过考试，但让他惊讶的是，他挂科了。

He just took it for granted that he would pass the exam, but to his surprise, he failed it.

youdao

And Moses admonishes the Israelites not to suppose that their inheritance of the land of Canaan is due to their own powers, or on account of any righteousness or virtue that they possess.

摩西警告以色列人不要想当然地认为,他们继承迦南之地是凭借了自己的力量，或者视之为他们所拥有的正义和美德。

耶鲁公开课 - 旧约导论课程节选

I think that people take it for granted

我觉得人们想当然地认为，

美国的移民法 - SpeakingMax英语口语达人

We just take it for granted that what we're reading is completely within our own horizon and we don't make any effort at all to understand that which is fundamentally or at least in some ways different.

我们想当然地认为,我们读的东西都在自己的视域之中,并不必花费什么精力,去理解那些基本上不同或有些不同的东西。

耶鲁公开课 - 文学理论导论课程节选