1
Tourism has become a major economic driver in many countries.
翻译
Tourism has emerged as a key economic engine in numerous nations.
重点解析：本句使用了现在完成时态has become，表示从过去到现在的一个变化过程。主语Tourism是不可数名词，谓语动词用单数形式。形容词major修饰名词economic driver，构成复合名词短语。介词in引导地点状语，修饰countries。
2
The development of tourism can create numerous job opportunities.
翻译
The growth of tourism can generate a multitude of employment opportunities.
重点解析：本句使用了情态动词can加动词原形create表示可能性。主语The development of tourism是动名词短语，谓语动词用单数形式。形容词numerous修饰名词job opportunities，表示数量多。
3
However, excessive tourism may lead to environmental degradation.
翻译
Nevertheless, over-tourism may result in environmental deterioration.
重点解析：本句使用了however作为副词连接两个分句，表示转折关系。情态动词may加动词原形lead to表示可能性。形容词excessive修饰名词tourism，表示程度过高。
4
Local communities often benefit from increased tourism revenue.
翻译
Local communities frequently reap benefits from augmented tourism revenue.
重点解析：本句使用了副词often修饰动词benefit，表示频率。介词短语from increased tourism revenue作状语，修饰benefit。形容词local修饰名词communities。
5
Cultural heritage sites are at risk due to the influx of tourists.
翻译
Cultural heritage sites face potential threats from the influx of tourists.
重点解析：本句使用了被动语态are at risk，表示状态。介词due to引导原因状语，修饰整个主句。名词influx表示大量涌入。
6
Sustainable tourism practices are essential for long-term preservation.
翻译
Sustainable tourism practices are crucial for long-term conservation.
重点解析：本句使用了形容词sustainable修饰名词tourism practices。形容词essential作表语，后面接不定式for long-term preservation作目的状语。
7
Governments should implement policies to regulate tourist activities.
翻译
Governments ought to implement policies to regulate tourist activities.
重点解析：本句使用了情态动词should表示建议。动词implement后接to regulate表示目的。名词policies是复数形式，与动词are保持一致。
8
The rise in international tourism has boosted local economies.
翻译
The surge in international tourism has stimulated local economies.
重点解析：本句使用了现在完成时has boosted，表示过去发生的动作对现在造成的影响。名词surge表示急剧上升。介词in引导名词性短语international tourism。
9
Tourists must respect local customs and traditions.
翻译
Tourists must adhere to local customs and traditions.
重点解析：本句使用了情态动词must表示义务。动词respect后接并列结构local customs and traditions。名词customs和traditions都是复数形式。
10
Overtourism can strain local infrastructure and resources.
翻译
Overtourism can strain local infrastructure and resources.
重点解析：本句使用了名词overtourism作为复合词，表示过度旅游。情态动词can加动词strain表示可能性。并列连词and连接两个名词性宾语。
11
Educational tourism promotes cultural exchange and understanding.
翻译
Educational tourism fosters cultural exchange and mutual understanding.
重点解析：本句使用了形容词educational修饰名词tourism。动词promotes后接两个并列宾语cultural exchange and understanding。
12
The economic benefits of tourism must be balanced with environmental concerns.
翻译
The economic benefits of tourism must be balanced against environmental concerns.
重点解析：本句使用了被动语态must be balanced，表示被动含义。介词of引导名词性短语tourism。介词against表示对比关系。