1. 戰(zhàn)爭帶來的必然結果就是生產力下降。
   The necessary outcome of a war is a fall in production.
2. 作出決策乃當務之急，此事必然地落在他身上。
   The necessity for making decisions devolves on him.
3. 批評家是必然的 * ，而批評是 * 的必然。
   A critic is a necessary evil, and criticism is an evil necessity.
4. 模態(tài)邏輯命題的限制條件，建立在其內容的肯定或否定其可能性，不可能性，偶然性或必然性基礎之上
   The classification of propositions on the basis of whether they assert or deny the possibility, impossibility, contingency, or necessity of their content.
5. 工資一高物價就高，這是不是合乎邏輯的必然規(guī)律？
   Is it a logical necessity that higher wages will lead to higher prices?

必的英語翻譯：

然的英語翻譯：