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大当たり， 大当り， おおあたり
1. great success, big hit, smash hit, winner
2. (hitting the) jackpot, big win
3. being right on the mark (of a prediction), being bang on, hitting the nail on the head
4. bumper crop
5. excellent hitting
tbd
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
