If you describe a person or their comments as vacuous, you are critical of them because they lack intelligent thought or ideas.
例句
Male models are not always so vacuous as they are made out to be.男模特儿并不总像人们说的那样愚蠢。...the usual vacuous comments by some faceless commentator.一些千人一面的评论员给出的毫无意义的寻常意见