omission/omit

omission /əuˈmiʃən/ n. [u] & [c] 省略，删节；遗漏：an unfortunate omission不幸的遗漏The omission of the girls was unfair.把女孩排除在外是不公平的。by omission 由于疏忽：Several offences such as manslaughter may be committed by omission.一些罪行，比如误杀，可能是由于疏忽而引起的。

 omit /əuˈmit/ vt. 1. 删掉，漏掉；省略：This part of the book may be omitted. 书的这部分可删掉。［考句］I hope that you’ll be more careful in typing the letter. Don’t omit anything.我希望你打信时要更加仔细，不要漏掉任何内容。2.忽略，没做(某事)：Please don’t omit locking/ to lock the door when you leave. 走时不要忘了锁门。