翻译几个英文单词？

unless fail 除非失败

unless:
conj.
1. 如果不,除非
I won't apologize unless she apologizes first.
除非她先道歉,否则我不道歉。
prep.
1. 除...外

fail
KK: []
DJ: []
n.[C]
1. 不及格
a fail in math
数学不及格
vi.
1. 失败
Our plan has failed.
我们的计划失败了。
He failed in everything he tried.
他做一切事情都失败了。
2. 不及格
She failed in the examination.
她这次考试不及格。
3. 失灵;失去作用
The engine failed.
引擎出故障了。
4. (指健康)衰退;变弱;消失
His hearing is failing.
他的听觉在衰退。
5. 破产;失去支付能力
Many small banks failed during the recession.
许多小银行在经济衰退期破了产。
6. 缺乏,不足;(作物)歉收
The crops failed for two years running.
农作物连续两年歉收。
vt.
1. 失败;不能;忘记[Y][+to-v]
He did very well, but failed to break the record.
他做得很出色,但未破记录。
2. 没有通过(考试),评定(学生)不及格
The professor failed almost half of the class.
该教授给班上几乎一半人评了不及格。
George failed history last semester.
乔治上学期历史考试不