Many applicants, whether they are repeat or first-time applicants, may be under the mistaken impression that Consular Officers only reluctantly issue visas.

在很多申请人中， 无论是返签还是首签的申请人， 他们也许会有一个错误的印象就是领事官员只会给他们拒签。

People have the mistaken idea that... / People are under the illusion/misapprehension/mistaken impression that... / People are misled into thinking...

人们误以为…

A story in today’s Washington Post leaves a mistaken impression that the FDA has begun the process of regulating the amount of sodium in foods.

华盛顿邮报误解了这个报告，以为美国食品药品监督管理局已经开始规范管理食品中的盐含量。