Gouka is my best friend.

The result of this synthesis provides a new perspective on our research.

In this chemical reaction, condensation occurs.

My name is Aiyoshiya.

Mr. Aino-tani is my best friend.

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

He is researching the effects of underground nuclear tests.

My house is near the station.

It is reported that North Korea has conducted another underground nuclear test.

Groundwater pollution has become a serious environmental problem.