He is looking for back issues of the magazine.

Cyanocobalamin is a type of vitamin B12.

Hydroxocobalamin is a type of vitamin B12.

He learned how to operate the anti-tank gun.

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.

In the professional wrestling match, he executed a backbreaker on his opponent.

I had the leftover food at the restaurant put in a doggy bag.

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He is known as an excellent quarterback.