1. The nail easily penetrated the soft wood. 钉子很容易地就穿透了软木材。
2. Introduction to penetrate the firewall and procedures to help beginners. 穿透防火墙的介绍和程序，对初学者有帮助。
3. These canyons allow daylight to penetrate the lower areas of the addition. 这些峡谷可以让日光覆盖加建工程较低的区域。
英英解释
v.
1. pass into or through, often by overcoming resistance
2. come to understand
3. become clear or enter one's consciousness or emotions
4. enter a group or organization in order to spy on the members
5. make one's way deeper into or through
6. insert the penis into the vagina or anus of
7. spread or diffuse through
