英语Once more ,and for the last time on this earth.he was the centre of attention

题目

英语Once more ,and for the last time on this earth.he was the centre of attention
Once more ,and for the last time on this earth.he was the centre of attention.
此名中.for the last time on this earth,为何要用介词FOR.请详解.是根据语境还是此处为固定用法.

答案

固定的.表示所做的（动作）是为了最后一次
i ll do this for the last time我将最后一次做这个
only for the last time只是最后一次