来自拉丁语penetrare,穿过，进入，来自penes,在里面，进入，词源同penates.-tra,比较级后缀，词源同intra-,interior.字面意思即进入，引申词义穿过，穿透，性交等。

1. They are hoping to penetrate the Japanese market with their latest product.

他们希望他们的最新产品能打进日本市场.

2. I heard what you said, but it didn't penetrate.

你的话我听见了, 但是没有听懂.

3. She could penetrate what I was thinking.

她了解我在想什么.

4. Western ideas penetrate slowly through the East.

西方观念逐渐传入东方.

5. The CIA had requested our help to penetrate a drugs ring operating out of Munich.

美国中央情报局已请求我们协助其打入在慕尼黑市外活动的贩毒集团。