探讨了一本教材中关于酸碱指示剂作用原理的理论变色范围探讨，指出了该教材在理论变色范围推论中存在的问题。
Discussed a reason discoloration range of acid-base indicator function reason in a text book, pointed out some discoloration reason problems in the book.
在离太阳15光年的范围内有大约56颗恒星，分布在38个恒星系中。以上推论都是大概的，因为如下原因。
Within 15 light-years of the sun there are approximately 56 stars, in 38 separate stellar systems. I say approximately for several reasons.
“割圆术”包含近代极限思想，其过程是一个无限过程，可以创造崭新结果；而“穷竭法”适用范围更广，是一个有限过程，结合归谬法可以推论预期的结。
But the method of infinite approach is used more widely, it is a uninfinite procedure, and it only can achieve the desired results with reduction to absurdity.
对于仅作三段式推论的思想家来说，这种出发点似乎是坚实的基础，并始终保持在经验的范围内。
The merely syllogistic thinker may deem this starting-point a solid basis and suppose that it remains throughout in the same empirical light, left at last as it was at the first.
对于仅作三段式推论的思想家来说，这种出发点似乎是坚实的基础，并始终保持在经验的范围内。
The merely syllogistic thinker may deem this starting-point a solid basis and suppose that it remains throughout in the same empirical light, left at last as it was at the first.
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