Workers of the world, unite, the time has come to show our strength.

He is good at playing the acoustic guitar.

I spilled the powder in the kitchen.

He is good at playing the guqin.

The People's Democratic Republic of Yemen was once an existing country.

The National Research and Development Agency plays a crucial role in advancing science and technology.

He is fighting against illness.

He stood up against the enemy.

He couldn't refrain from the spiciness.

The Democratic People's Republic of Korea is located in Asia.