Scientists are warning that this substance has carcinogenicity.

This area is still undeveloped.

This area is still undeveloped and rich in nature.

Scientists are warning that this substance is carcinogenic.

He is struggling with the spelling pronunciation of English.

Please remove the core of this apple.

This shape is a parallelogram.

Learning Japanese honorific language is difficult.

This picture has a blue pentagon drawn on it.

He is majoring in metaphysics at university.