He has physical strength, so he can work for a long time.

His work is overflowing with life force.

His insight greatly contributed to the success of the business.

His masticatory force is surprisingly strong.

I find my new fountain pen easy to write with, and I really like it.

He is facing many difficulties due to gender identity disorder.

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.

Lions are carnivorous animals.