"他们保持练习的英语" 是指他们不断练习英语，以便保持英语的流利程度。这句话的来源是从英语中直接翻译过来的，其中 "保持" 的意思是 "to maintain"，"练习" 的意思是 "practice"，"英语" 的意思是 "Engpsh"。
下面是一些例句：
I make sure to practice my Engpsh every day so that I can maintain a high level of fluency. (我每天都确保练习英语，以便保持流利的水平。)
My parents encourage me to keep practicing my Engpsh so that I can improve my skills. (我的父母鼓励我保持练习英语，以便提高我的技能。)
Many people in my community attend Engpsh language classes to maintain their proficiency in the language. (我们社区的许多人参加英语课，以便保持他们的语言能力。)
下面是一些例句：
I make sure to practice my Engpsh every day so that I can maintain a high level of fluency. (我每天都确保练习英语，以便保持流利的水平。)
My parents encourage me to keep practicing my Engpsh so that I can improve my skills. (我的父母鼓励我保持练习英语，以便提高我的技能。)
Many people in my community attend Engpsh language classes to maintain their proficiency in the language. (我们社区的许多人参加英语课，以便保持他们的语言能力。)