We installed a tank to store rainwater.

This factory is treating wastewater with consideration for the environment.

He saved the children from danger.

He drank water.

She is like a pure maiden.

Please calculate the volume of this cone.

She personifies nature and treats it like a friend.

He personified nature and called it Mother Earth.

He is an expert in chemistry.

Erhua, or 兒化, is one of the characteristic phonetic phenomena of Beijing dialect.