His actions exerted a great influence on our plans.

He is facing many difficulties due to gender identity disorder.

This problem is very serious.

Do you understand the seriousness of this problem?

His opinion had a big influence on my decision.

That news greatly influenced his opinion.

The study of genes greatly contributes to the advancement of medicine.

Gender discrimination is one of the social issues that needs to be resolved.

It's difficult to understand his real nature.

Rabbits are herbivorous animals.