String theory is primarily focused on the working of musical instruments.
举一反三
- String group: The violin is called the king of musical instruments
- Apollo taught Pandora how to play various musical instruments.
- You don't play any musical instruments,______?
- In a rock band, you need three people. The three musical instruments mentioned are _____.
- 中国大学MOOC: What are the basic types of musical instruments mentioned in this unit?