The Week

Snapshot

作者：21st

Never too old to run

US marathons had 541,000 finishers last year, an all-time high. The chart shows the age groups of marathons. A marathon is 42km long. Sometimes people run half-marathons that are 21km.

点击阅读全文

对本期电子报订户、有效期内的VIP教师会员和本学期初二尊享卡用户，我们开放所有内容：
如果您拥有以上权限，请点这里登录；
订阅电子报，请点这里；
激活VIP教师卡，请点这里；
激活21英语尊享卡，请点这里。