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- Inference of the obverse of a proposition. 换质法推导一个命题的方法
- Her most essential quality is kindness. 她最主要的品质是善良。
- This is the inverse of his earlier proposition. 这和他早些时候提的建议截然相反。
- A proposition obtained by conversion. 逆命题通过换位得到的命题
- Surprise is an essential component of my plan. 我这项计划主要就是想使大家惊喜一下。
- Rice is our essential foodstuff in life. 大米是我们生活的基本食物。
- Keeping a shop in this village is not a pay proposition. 在这个村子里开设商店是一桩亏本的买卖。
- National unity is essential in time of war. 举国团结在战时是非常重要的。
- What is the essential theme of the play? 这剧本的主题是什麽?
- Limit your expenditure to what is essential. 你要把开销限制在必要的范围内。
- It is essential that he get up early. 他有必要早起。
- Get a hustle on to stockpile these essential material. 赶快把这些重要材料贮放起来。
- The positive or negative character of a proposition. 命题的性质命题的肯定或否定的性质
- Mass education is essential in promoting democracy. 民众教育对提倡民主是非常重要的。
- The students discussed the proposition that man is basically good. 学生们讨论了这么一个论点,即人性本善。
- It is essential to balance one's budget. 量入为出是很重要的。
- His proposition is good in theory but cannot be put into practice. 他的建议在理论上可以，但不能付诸实现。
- Mutual understanding is essential to friendship. 相互理解对友谊至关重要。
- Tunnelling under the English Channel is a big proposition. 在英吉利海峡海底凿隧道是一个大问题。
- Articulate speech is essential for a teacher. 对教师来说,口齿清楚是必不可少的。
