第七步：乘坐公共交通或者和朋友拼车来节省油钱。走路是不需要花钱的，而且是很好的运动。
Step 7: Take public transportation, or carpool with friends to save on gas. Walking is free, and it's great exercise!
第七步：乘坐公共交通或者和朋友拼车来节省油钱。走路是不需要花钱的，而且是很好的运动。
Step 7: Take public transportation, or carpool with friends to save on gas. Walking is free, and it's great exercise!
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