His effort is exactly like the proverb 'Even a fool can move a mountain.'

He crossed many mountains and rivers to meet her.

If you train your external oblique muscles, your waist will become tighter.

He is doing a special exercise to strengthen his abductor digiti minimi.

He cut the apple.

He rejoiced when he heard about the success.

He is interested in ichthyological research.

Knock-knock, someone is knocking on the door.

Thinking sensibly, that plan will not succeed.

He has astronomical knowledge.