"Cassy runs three times a week for weight loss."
来源：这是一个简单的句子，是根据语言基础知识构建的。
英文例句：
"Cassy has made a commitment to run three times a week to improve her health."
"Running is a big part of Cassy's weight loss plan and she aims to stick to running three times a week."
中文翻译：
"凯西已经承诺每周跑步三次以提高她的健康状况。"
"跑步是凯西减肥计划的重要组成部分，她的目标是坚持每周跑步三次。"