As is subtly portrayed in the cartoon,

如图所示

two tourists are taking sightseeing on a small boat while discarding their picnic leftovers casually into a lake.

两名游客正在一艘小船上观光，同时把野餐的剩余垃圾随意丢入湖中。

Unfortunately, the lake is already littered and teamed with flow rubbish like plastic containers, fish-bones, banana peel, watermelon rind, bottles, tins, food wrappings, and so on.

不幸的是，湖中已经堆满了漂浮的塑料盒、鱼骨、香蕉皮、西瓜皮、瓶子、罐头、食品包装等各种垃圾。

And below the drawing,there is a topic which says: "after" the travel or "me" in the travel.

在图画下方，有个小小标题写着：旅程之“余”。

From the portrayal,we can conclude that the painter wants to convey such a message:

从漫画中，我们可以得出结论，画家想要表达这样一种信息：

a good many scenic spots are flooded with visitors,

成群的游客涌入众多景点，

who spoil the beauty of nature by creating and leaving behind God-knows-how-much trash.

制造并留下了大量的垃圾，破坏了自然之美。

On the one hand, tourism, as a multibillion-dollar business, is booming everywhere.

一方面，旅游业作为一项产值数十亿美元的产业，正在世界各地迅猛发展。

Some people, laboring under the belief that tourism serves as an engine of economic growth,

有些人认为旅游业是经济发展的引擎，

seem to ignore its negative effects on the environment.

似乎忽视了其对环境的负面影响。

Nevertheless, these are not concerns that we can shrug off lightly.

然而，我们必须充分关注这一问题。

On the other hand, tourism has exerted great pressure on the environment we are living in:

另一方面，旅游业已经给我们生存的环境带来了巨大的压力：

water is polluted, the ecological system is disturbed,

水受到污染，生态平衡遭到破坏，

and natural resources have been excessively used.

自然资源被过度开发。

Undoubtedly, tourism could not be banned in any country as it does help to shore up the economy in places which have few sources of income.

毫无疑问，由于对那些几乎没有其他收入来源的地区而言，旅游业确实有助于发展经济，因此任何国家都无法禁止旅游业。

However, the significant point is that the unchecked growth of the travel business may render the development of an economy unsustainable.

但更重要的是，旅游业毫无节制的发展可能使得经济发展不可持续。

It is high time that we enhanced people's awareness to rectify this by taking the environmental protection into consideration.

是时候加强人们的意识，通过多加考虑环境保护因素来改变这一现状了。