n.

1. 穿透；穿透能力；穿透深度[C][U]
2. 渗透；侵入[C][U]
3. 【军】突破；（空战中）深入敌方的飞行[C][U]
4. 敏锐；洞察力[U]
   He is a man of penetration.

   他是一个富有洞察力的人。

n.

1. the action or process of penetrating.
2. the extent to which a product is recognized and bought by customers in a particular market:
   the company achieved remarkable market penetration.
3. perceptive understanding of complex matters.