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.

He used niobium wire to create beautiful ornaments.

He was surprised to find the itomaonoashi.

In the park, she was spinning thread in the shade of a tree.

He is running a restaurant.

He likes to read books in his spare time.

I had leisure all day today, so I spent it reading a book.