他们准备赛跑的英语怎么说

"They are preparing for a race" is a possible way to say this in English. The phrase is derived from the verb "to prepare," which means to make something ready for a specific purpose.

Here are some examples of this phrase in English:

"They are preparing for a marathon next month."
"She is preparing for her driving test tomorrow."

In Chinese, this phrase can be translated as "他们正在准备参加一场比赛" or "她正在准备明天的驾驶考试".