He is studying ballistics as a part of physics.

He is an expert in ethology.

He put up a hard fight, but ultimately lost.

He believes in his knowledge power.

He has an astonishing amount of physical strength.

He used all his willpower to overcome the difficulty.

That sumo wrestler is being noticed as a new star of grand sumo.

He used a vise to secure the parts.

He solved the problem by himself.

He had a sharp weapon in his hand.