penetration
noun [ U ] uk/ˌpen.ɪˈtreɪ.ʃən/ us/ˌpen.əˈtreɪ.ʃən/
(MOVEMENT INTO)
进入；穿透
a movement into or through something or someone
Sunscreens can help reduce the penetration of ultraviolet rays into the skin. 防晒霜可以减少紫外线穿透皮肤。
The company is trying to increase its penetration of the market. 该公司正在努力扩大其市场份额。
（性交时阴茎的）插入
the act of a man putting his penis into his partner's body during sex
(UNDERSTANDING)
formal洞察力
someone's ability to understand quickly and well