Dear Emily,Would you please help me understand how the word "source" is used in the following sentence? "The road had a new wet patch, which I sourced back to my car."
...
- 对本期电子报订户、有效期内的VIP教师会员和本学期二十一世纪英文报尊享卡用户，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。
