下课了…老师讲的很好，只是我没听懂…🐣🐣🐣 A photo posted by Wei Chen (@vchenvision) on May 9, 2015 at 11:40am PDT
下课了…老师讲的很好，只是我没听懂…🐣🐣🐣
A photo posted by Wei Chen (@vchenvision) on May 9, 2015 at 11:40am PDT