原文中文
当一个人情绪低落时，应当学会如何掌控情绪，否则就会被负面情绪所左右。
When in a low mood, one should learn how to control their emotions.
当情绪低落时，人应该学会如何控制自己的情绪。
该句使用时间状语引导情境，并通过should表达建议和自我提升。
When in a low mood, one should learn how to control their emotions; otherwise, they will be controlled by them.
当一个人情绪低落时，应当学会如何掌控情绪，否则就会被负面情绪所左右。
"When you are angry, please keep your mouth shut to prevent your anger from escalating further."
"Do not exhaust yourself by trying to guess or speculate; it only leads to fatigue."
"An agitated heart leads to anxiety, and a cluttered mind brings confusion."
"Do not let yesterday's troubles affect today's mood"
"By mastering our emotions, the value of life is elevated."