travel当名词讲时与traveling的区别?

travel当名词讲时与traveling的区别? travel作名词讲,与它的动名词traveling有何不同? was traveling 与 was to travel 的区别 travel traveler traveling 区别 to travel 与traveling作主语有何区别 to travel 与 traveling 作主语有何区别 trip ,travel,traveling和tour的区别和用法 travel in与travel to的区别? travel trip tour 当“旅行”讲时有何区别? hobby与appetite当嗜好讲时的区别 travel与trip的区别 travel的复数是travelling还是traveling?