He traveled east and west.

I am learning how to use the present participle in English.

This building is made of high-quality steel.

It is important to understand the merits and demerits of this technology.

This mixture is used to alleviate the symptoms of a cold.

Lime sulphur is often used to prevent pests and diseases in fruit trees.

He was feeling guilt.

I am currently living in Tokyo.

In Christianity, the act of Adam and Eve is considered the original sin of mankind.

On sleepless nights, I sometimes take a soporific.