This old radio uses a triode.

I like making sandwiches.

Vitamin D3 is an important nutrient for bone health.

This horse is a Dosanko, native to Hokkaido.

The leisure industry occupies an important part of the economy.

She is temporarily off work to take maternity leave.

Traffic cones have been set up due to road construction.

In chemistry class, I learned about basic oxides.

Amphoteric oxides have the characteristic of reacting with both acids and bases.

In chemistry class, I learned about the reactions of acid anhydrides.