2015年考研英语一翻译真题及答案解析如下：
真题原文：
The Internet is a vast and complex system of computer networks that connects millions of people around the world. It allows users to communicate, share information, and access a wide range of resources. However, with the rapid development of the Internet, new challenges have emerged, such as information overload, privacy concerns, and security threats.
答案解析：
1. The Internet is a vast and complex system of computer networks that connects millions of people around the world.
- 这句话的主干是“The Internet is a system”，其中“a vast and complex system”是定语，修饰“system”。谓语是“connects”，宾语是“millions of people”，定语从句“that connects millions of people around the world”修饰“system”。
2. It allows users to communicate, share information, and access a wide range of resources.
- 这句话的主语是“It”，指代“The Internet”。谓语是“allows”，宾语是“users”，宾语补足语是“to communicate, share information, and access a wide range of resources”。
3. However, with the rapid development of the Internet, new challenges have emerged, such as information overload, privacy concerns, and security threats.
- 这句话的主干是“new challenges have emerged”。时间状语从句“with the rapid development of the Internet”说明“new challenges”产生的原因。列举了三个新挑战：“information overload, privacy concerns, and security threats”。
总结：
这段话主要介绍了互联网的快速发展及其带来的新挑战。翻译时要注意句子结构和词汇的准确性。
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