We will have you decide to accept the offer by the end of February. If you commit our office, please let me know as soon as possible. We have a couple of good candidates too. If you decide not coming, we will give the offer to someone else in the end of February.
以上是邮件正文,目前决定不了去不去,求助怎么回复可以拖得久一些。。还有一个同档次的PhD还没消息,想等等再看