go far
1.(指人)有出息,有前途
2.有助于,起很大作用
3.(指物)经用,经吃,用很长时间
4.走得远,走远距离：
I go far to my work.
我上班走很远的路.
5.[口语]大有前途：
He will go far in the diplomatic service.
他在外交部门会大有前途.
6.(钱)价值大；(供应)够用,持久：
These potatoes won't go far when there are ten people to feed.
这些土豆不够十个人吃.
7.起很大作用：
These measures should go far towards solving the problem.
这些方法对解决问题大有帮助.
go head
取得进展；先走
例句：No,go head.Could I read your newspaper for a while?
不介意,你就放在这里吧.我能读一会儿你的报纸吗?
Otherwise,you will easily lose your way and hesitate to go head.
否则,你很容易就会迷失方向或犹豫不前.