1 (used about sb's eyes or of a way of looking) making you feel uncomfortable because it seems sb knows what you are thinking （指眼神或看人的方式）尖锐的，犀利的: a penetrating look/stare/gaze 会意的神情╱注视╱凝视penetrating blue eyes 敏锐的蓝眼睛

2 showing that you have understood sth completely and quickly （显得）有洞察力的，敏锐的: a penetrating question/comment 深刻的问题╱评论

3 that can be heard, felt, smelled, etc a long way away 有穿透力；有渗透力的；强烈的