该句使用 once 引导时间状语从句，主句使用 sets in 这一固定搭配表示‘开始、到来’，形象地描绘了无聊情绪悄然降临的过程。
If desires remain unsatisfied, one suffers; once they are fulfilled, boredom sets in. Life swings ceaselessly between these two states of suffering and boredom.
Do not lament that you are not a strong person, nor believe that only heroes can be considered strong. When you experience the joy of overcoming yourself, you already possess the heart of a strong person.
When a single tooth aches, the entire mouth is unsettled; when one meridian is blocked, all others become obstructed. When it comes to illness, one should act on the first signs, treating diseases as soon as they appear to prevent them from worsening.
Suffering that is spoken of is no longer truly bitter; only the pain that remains unspoken is true suffering. The most painful moment in life is not when one cannot afford to eat, but when one has the will to strive and struggle, yet finds no opportunity to do so.
The road of life is full of ups and downs and twists. However, no matter how tortuous life may be, time always moves in a straight line and is absolutely fair to everyone.
The place closest to you may actually be the farthest to reach; the simplest tone requires the most arduous practice to master.
欲望若不得满足，人便感到痛苦；而一旦欲望得到满足，随之而来的往往是无聊。生命，便是在痛苦与无聊这两种状态之间不断摇摆。
不要感叹自己并非强者，也不要误以为唯有英雄才能被称为强者。当你体验到战胜自我的欢欣时，你便已拥有了强者的胸怀。
一颗牙齿疼痛，整张嘴巴便不得安宁；一条经脉不和，全身百脉便无法通畅。对待疾病应当防微杜渐，若有病痛，务必尽早治疗！
说出口的苦楚不再算是真正的苦，唯有无法言说的苦痛才称得上是苦。人生最痛苦的时刻，并非饥肠辘辘吃不上饭的时候，而是心中渴望努力奋斗，却找不到任何机会的时候。
人生的道路充满坎坷，也遍布曲折。然而，无论人生如何蜿蜒曲折，时间永远是笔直的，且对任何人都绝对公平。
离你越近的地方，往往路途越远；最简朴的音调，需要最艰苦的练习才能掌握。