We need to evaluate the cost-effectiveness of this project.

The photoelectric effect is a phenomenon where a material emits electrons after absorbing light.

I am interested in the culture of China.

He is good at reading Chinese text.

I am busy with work during the day.

I work during the daytime.

He is researching the functions of the midbrain.

He was watching the television relay.

He was relaying the soccer match on TV.

My younger brother is currently attending middle school.