“『承诺』”
“除非”的英语单词是unless，详细信息如下：unless 英 [ənˈles] 美 [ʌnˈlɛs] conj.除非，如果不prep.除了，…除外例句：I'm not happy unless I ride or drive every day. 只有每天骑车或开车我才会开心。Avoid changing a nappy unless it's dirty or very wet. 除非尿布脏了或非常湿，否则别换。
杨大公主H
除非’用英语表达是：unless。unless 英[ənˈles] 美[ʌnˈlɛs] conj. 除非，如果不; prep. 除了，…除外; [例句]Unless you are trying to lose weight to please yourself, it's going to be tough to keep your motivation level high除非减肥是为了悦已，否则很难保持积极性。
