The knife had penetrated his chest.是什么意思？

The knife had penetrated his chest.

刀子刺入了他的胸膛。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

knife

n. 刀，匕首，刃部，手术刀；vt. 切割，刺，伤害；vi. 劈开，划过；

例句
Her husband was assailed by a young man with a knife in a Glasgow park.
她的丈夫在格拉斯哥的一所公园遭到一名持刀年轻男子的袭击。

had

v. 有（ have的过去式和过去分词 ），（亲属关系中）接受，拿，买到；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

penetrated

v. 穿过( penetrate的过去式和过去分词 )，刺入，了解，渗透；

例句
Waves of misery penetrated every pore.
痛苦深彻骨髓。

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

chest

n. 胸部，胸腔，箱子，金库，资金；

例句
His chest was swathed in bandages.
他的胸部缠着绷带。