1/commit释义：
vt. 犯罪把...交托给指派…作战使…承担义务（公开地）表示意见
vi. 忠于（某个人、机构等）承诺
2/例句：
The police suspected that the young man covered in blood had committed murder.
警察怀疑那个浑身是血的年轻人犯了谋杀罪。
3/commit扩展词有：
commit oneself承诺，答应负责
commit suicide自杀
commit a crime犯罪犯下罪行
commit crime犯罪干坏事
commit murder谋杀
