/,penɪ'treɪʃn; ,pɛnə`treʃən/
n [U]
1 (action or process of) penetrating 进入; 穿过; 充满; 看穿; 洞察; 领悟
*our penetration of the enemy's defences 我军对敌人防线的突破.
2 ability to think and understandquickly and deeply 洞察力; 领悟力
*the penetration of her mind/her powers of penetration 她的悟性.

n
[U and C]
when something or someone enters or passes through something, especially when this is difficult
　Cover the entire device to prevent water penetration.
penetration of
　The attack failed to lead to any deep penetration of enemy territory.
[U and C]
the degree to which a product is available or sold in an area
penetration of
　the rise in import penetration of the domestic market
[U]
when a system of beliefs enters a society and becomes accepted
penetration of
　the penetration of Marxism into Latin America
[U]
when someone joins and gets accepted by an organization, business etc in order to find out secret information
penetration of
　foreign penetration of the British secret service
[U]
when a man puts his penis into a woman's vagina or into someone's anus
[U]
a special ability to understand things very clearly and completely