There are two meanings of the Sino-Mongolian translation of the word dalai in English - this word can mean both "ocean" and "<em><u>big</u></em>." In the context of Dalai Lama's title, it would be better to chose the latter meaning, given that the word Lama means "master, guru."
So the literal translation of the title would be - big master.
He used the atomic bomb against Japan because they were one of the world's major powers. They quickly industrialized and imperalized countries bigger than their own but USA didn't have that kind of firepower but we had bombs to drop with huge explosive power and Japan wasn't ready for that. Think to yourself and say what if Japan imperalized my country were or who would I be now
Before it was established, two-four year terms were common because president Washington popularized it by his choice to do so. This was however never a written law, when the 22nd Amendment was created it was due to the fact President Roosevelt won four terms.
Hope this helped! :)
Listen carefully to them and ask for help if you need to.