完全不一样 travel in time :in time 及时 翻译为 及时行乐travel through time :穿越时间的旅行,也指时间跨度You should travel in time as you are young.(趁年轻,及行乐）Man has always sought a way to travel ...那“what if someone or something traveled back in time and changed the ensuing future?”中“in time”怎么解释？。。。in time 及时，适时travel back(travel through time)穿越时空