His behavior became grounds for suspicion.

On is always maintaining a calm attitude.

He was worried about starting a new project, but I advised him, 'Doing something is easier than worrying about it.'

The protection of this town is my responsibility.

I use a set square to draw shapes.

In chemistry class, I learned about acid anhydride.

In chemistry class, I learned about acidic oxides.

Lower fatty acids play an important role in the human body.

Essential fatty acids are necessary to be taken from our diet because our body cannot produce them on its own.

Essential amino acids are vital nutrients for the human body.