But if it comes gradually, duly intermixed with a knowledge of what is good, and in the course of a scientific study inspired by the wish to get at the truth, it will have no such effect.

照我看，如果真相来得循序渐进，又恰如其分地引导学生了解什么是善和恶，如果这一切出现在科学研究的过程中，并为追求真理的愿望所鼓舞，就不会有这种效果。

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Teacher's knowledge is richer, the field of vision is broader, the scientific accomplishment is more comprehensive, the teaching effect is better.

教师的知识愈丰富，视野愈宽广，科学素养愈全面，教学的效果就愈好。

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