谁在什么时候发明了电话,其好处和坏处是什么,用英语回答

German research scientist Philipp Reis invented telephone.
Advantages：It had a large impact, it made business more efficient and it saved money from having to travel back and forth from distant places, and it made transactions able to occur more quickly. It led to instant communications around the world and even led to the Internet.
If you didn't have the telephone then how would you contact people? You wouldn't. if you wanted to talk to people you would have to go to their house, or meet them somewhere. That would be hard. The world's communication has been upgraded greatly by Alexander Graham Bell, the inventor of the telephone. It was much easier to communicate with people.
Telephones are a huge part of today's culture. As telephones became more and more advanced they also became more and more popular. Nowadays it is the most common way of communication. Our modern day telephone system has made our communication system more unified and almost in real time. Telephone has bridged the gap of long distance communication.
Disadvantages: In the modern day, there is actually growing concern that mobile telephones are emitting waves and signals that could potentially damage the brain. Given that mobile telephones, in historical terms, are relatively new we do not have any extended research on what these waves and signals are able to do to the brain. Hence, all we can do is carry on using the mobile phones and see what happens in the future. For all we know, these mobile phones could be causing cancers in a large proportion of their users. However, we could be completely wrong and find out that mobile phones don’t cause any damage at all.