After the fire, black smoke was hanging in the sky.

Believing that failure is a stepping stone to success, he challenged again.

Believing that failure leads to success, he continued to challenge himself over and over again.

He is studying astronomy to deepen his understanding of the macrocosm.

He is keeping unwanted visitors away by setting up a sparrow net in front of the gate.

He starts talking about himself at every opportunity, causing trouble for the people around him.

He likes to take a walk in the park at dusk.

In chemistry class, I learned about basic oxides.

Macrophages are a type of cell that engulfs foreign substances in the body.

I like to add string beans to my salad.