It is more difficult to illustrate this third point, because few really good books make obvious slips in reasoning.

说明第三点比较困难，因为很少有真正的好理上出现明显的失误。

Being called " dear" without any tenderness in the tone afforded no pleasure to Julien; he was astonished at not being happy, and eventually fell back on his reasoning in order to be so.

人称呼为“亲爱的”，语气中没有任，于连并没有感到高兴。他对不快乐感到惊讶，最终又回到了他的理上，以便如此。