The letter was deliberately couched in very vague terms.

这封信故意写得含糊其辞。

《牛津词典》

Why, then, are vague terms so prevalent?

那么，为什么是模糊的条件如此普遍？

youdao

Instead, it mostly used such vague terms as "probably" or "seemingly".

而大多使用的是“大概”或是“似乎”这样暧昧的措辞。

youdao

But in order to do so, you have to use terms like "punishment" and "reward" and "reinforcement" in such a vague way that in the end you're not saying anything scientific.

但如果你要这样去做，你就必须将惩罚，奖励“,强化之类的术语概念模糊化,最终你所作出的解释便毫无科学性。

耶鲁公开课 - 心理学导论课程节选

The United States and Iraq began negotiating the agreement this year but have not publicly discussed its contents except in vague terms.

CNN: Al Sadr: Let Iraqis decide on U.S. troops

On 20% of direct questions, he answered in impossibly vague terms.

WSJ: Coach Jim Harbaugh Presents: How to Not Answer a Question

The DOJ would have sole discretion as to whether KPMG was following the vague terms of the agreement and could reopen the prosecution at any time.

FORBES: KPMG and Scott London: Long-Forgotten Devil's Deal Means Feds Are Unlikely to Bring Corporate Charges