1. The company conducted a study on market penetration to determine its reach and impact.
公司进行了一项市场渗透的研究，以确定其覆盖范围和影响力。

2. The spy's successful penetration of the enemy's defense system led to valuable intelligence being obtained.
间谍成功渗透了敌方的防御系统，从而获得了有价值的情报。

3. The psychologist's deep understanding and penetration into the human psyche allowed him to offer valuable insights.
心理学家对人类心灵的深入理解和洞察力使他能够提供宝贵的见解。