Travel

As a noun, 'travel' refers to the activity in general and is generally used as an uncountable noun.
travel做名詞的時候指的是旅行這種行為本身，通常用作不可數(shù)名詞。

例句：

I enjoy travel and playing golf.
我喜歡旅行和打高爾夫。

Travel and music are two of my favorite activities.
旅行和音樂是我最喜歡的兩件事。

'Travel' can also be used as a verb and refers to the activity of moving from one place to another. Generally, 'travel' is used as a general verb and is rather formal. People often use the mode of transport to express this activity.
travel還可以用作動詞，指的是從某地到另一地的行為。通常travel這個動詞很正式，人們更愿意用交通工具來表達這種行為。

例句：

I travelled by plane to Madrid. = I flew to Madrid.
我坐飛機去了馬德里旅行。= 我飛去馬德里的。

She travelled more than three hundred miles to get to the meeting. = She drove more than three hundred miles to get to the meeting.
她穿越三百多公里來到會場。= 她開車開了三百多公里到達會場。

Sometimes, 'travel' is also used as a countable noun in the plural form. In this case, it is often used in the sense that someone has been to many different places during one longer journey. This usage is also rather formal, and isn't likely to be used much in everyday speech.
有時候，travel也用作可數(shù)名詞，只用復(fù)數(shù)形式。在這種情況下，通常是表示一個人在一次長途旅行中到達過很多地方，這種用法也同樣很正式，不經(jīng)常用于生活口語中。

例句：

His travels took to the far corners of the globe.
他的旅程到達了地球最遠的角落。

Ms Bancroft sketched extensively during her travels around Europe.
在環(huán)歐之旅中，Bancroft夫人畫了大量的素描。