题目内容：

on travel 和for travelling的区别;visit on 和visit to的区别
举例

优质解答

on travel: "在旅途中",强调旅游正在进行
The official on travel repulsed their request. (正在旅行中的官员拒绝了他们的请求.)
for travelling: "为了旅行...(所准备的...)"
They prepared lots of information for travelling.
(他们为旅游准备了不少资料.)
He is going to Japan for travelling.
(他就要去日本旅行了.)
visit可作为及物动词使用,本身不需要跟介词.
visit on:
1. =visit upon sb.: 诅咒某人
2. on是与后面一个名词搭配的,比如:
visit on our invitation (在我们的邀请下来访)
visit to:
这里的visit只可能是作为名词, 完整的应该是:
pay a visit to