he stayed with the foremost runner till the last lap but one.什么意思啊?
问题描述：
he stayed with the foremost runner till the last lap but one.什么意思啊?
but one 什么意思啊?
答
在还剩最后一圈的时候,他追上了跑在前面的人.
but one是last lap的同位语.