penetrate/ˋpɛnə͵tret; ˈpenətreIt or ˈpenItreIt/v [I,T] to enter something or pass through it, especially when this is difficult 进入﹔渗入﹔穿透﹐穿过: bullets that can penetrate metal 能穿透金属的子弹Sunlight barely penetrated the dirty windows. 阳光几乎照不进那些肮脏的窗户。 —penetration /͵pɛnəˋtreʃən; ˌpenəˈtreIʃ$n or ˌpenIˈtreIʃ$n/n [U]