In order to calculate the centroid of this shape, you need to know the area of each part and the position of its centroid.

I'm excited to hear that a new project is starting.

He always has a high sense of alertness.

He has a strong ambition and is always seeking self-improvement.

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.