虎落平阳的英文是「it was as though a tiger left his hills and descended to the plains」
hu luo ping yang
平阳:地势平坦明亮的地方。老虎离开深山,落到平地里受困。比喻失势。
清·钱彩《说岳全传》第四回:“虎落平川被犬欺。”