She has to post a letter instead.怎么翻译?他用寄出一封信代替?总感觉语句不通啊

问题描述:

She has to post a letter instead.怎么翻译?他用寄出一封信代替?总感觉语句不通啊

差不多,应该是
她不得不寄出一封信来代替(比如说以前没受到成效的方式,电话啦,email啦之类的,看语境.)