- a vacuous expression on his face
- A vacuous comment.
- Therefore, to avoid a vacuous academic talk, ethical misconduct cannot be treated with vague academic parlance.
- Rarely can such a vacuous concept have found its way into a debate claming to provide enlightenment.
- a vacuous stare, remark, laugh, expression
呆视、 空洞的话、 傻笑、 茫然的表情.