/ˈpɛnɪˌtreɪt/
to go into or through sth 穿过；进入
~ sth
The knife had penetrated his chest.
刀子刺入了他的胸膛。
The sun’s radiation penetrates the skin.
太阳的辐射能透进皮肤。
(figurative)
The war penetrates every area of the nation’s life.
战争波及全国国民生活的各个领域。
~ into/through/to sth
These fine particles penetrate deep into the lungs.
这些微小的尘埃可深深地吸入肺部。