It's difficult to understand his explanation.

Can you answer this question?

Please loosen this screw using a flathead screwdriver.

I think this project needs further improvement or addition.

This project includes not only basic functions but also additional elements.

Please tighten this screw using a Phillips screwdriver.

His explanation was impossible to understand.

It is important to understand the importance of health.

A new approach is needed to solve this set of problems.

The main problem with this project is the lack of communication.