美式英语一般不双写。英式英语双写。过去式：traveled/travelled；过去分词：traveled/travelled。travel例句：They travel round together.他们一起到处旅行。
双语例句
1、Our travel plans are still up in the air.
我们的旅行计划尚未决定。
2、Will time travel ever become a reality?
时光旅行真的会成为现实吗？
3、Some travel companies will probably go out of business this summer.
今年夏天一些旅游公司很可能歇业。
4、She travels around the world as if money is no object.
她漫游世界，好像钱不是问题。
5、I travel 40 miles to work every day.
我每天奔波40英里去上班。