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1. Alexander Graham Bell is often credited with inventing the telephone in 1876.

   Alexander Graham Bell is credited with inventing the telephone in 1876.

2. However, many scientists before him worked on similar ideas and technologies.

   However, before him, many scientists researched similar ideas and technologies.

3. Bell's key breakthrough was finding a way to transmit clear sound signals over long distances using electricity.

   Bell's key breakthrough was finding a way to transmit clear voice signals across long distances using electricity.

4. The first successful telephone call between two people took place on March 10, 1876.

   The first successful telephone call between two people took place on March 10, 1876.

5. This invention completely changed the way people communicated and connected with each other around the world.

   This invention completely changed the way people around the world communicate and stay connected with each other.

6. Today, the telephone has evolved into smartphones, which are far more advanced than Bell's original invention.

   Today, the telephone has evolved into a smartphone, which is much more advanced than Bell's original invention.

主な語彙

1. credited with

   ～で認められる

2. breakthrough

   画期的な進展

3. transmit

   送信する

4. signal

   信号

5. evolved

   進化する