He proposed a new theory about quantum mechanics.

Thanks to his serendipity, we were able to find a new business opportunity.

I use plain flour to make bread.

His efforts were like a mantis trying to stop a chariot, he couldn't achieve any results.

He is attending school to obtain a motorcycle license.

He learned how to operate the anti-tank gun.

We should always remember the power of Kannon in difficult times.

He faced difficulties with the spirit of 'one eye, two feet, three gallbladders, four strengths'.