He is interested in ichthyological research.

This design has a unique charm because it is asymmetrical.

He accidentally held her hand.

I'm troubled by his unproductive attitude.

He was affected by secondary effects.

That theory is unscientific and has no evidence at all.

This is a preliminary plan.

Thinking sensibly, that plan will not succeed.

He is thought to be a very unsociable person.

He is interested in diachronic linguistics studies.