问题描述：
英语翻译
We must decide each case on its merits.
We must decide every case on their merits.
We must decide each case on its merits.
We must decide every case on their merits.
问题解答：
我来补答
我们必须决定每个案件（事件）的是非
第2句话有语法错误!
应该改为we must decide every case on its merits.
Each和Every在此句中都是单数,没有区别可以互换!那位说each是二选一的纯属瞎掰.
请看参考图片中标题写的是lets decide every case on its merits
图片来自
（28 J. Am. Jud. Soc. 118 (1944-1945)
Let's Decide Every Case on Its Merits; Woodle, Edwin F. ）
第2句话有语法错误!
应该改为we must decide every case on its merits.
Each和Every在此句中都是单数,没有区别可以互换!那位说each是二选一的纯属瞎掰.
请看参考图片中标题写的是lets decide every case on its merits
图片来自
（28 J. Am. Jud. Soc. 118 (1944-1945)
Let's Decide Every Case on Its Merits; Woodle, Edwin F. ）
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