Thanks! The formula of this riddle is not hard to

来源: 2010-11-26 19:22:45 [旧帖] [给我悄悄话] 本文已被阅读:

figure out. Actually I could only solve a few of the many riddles you've posted. If I feel sort of no chance, I don't bother to crack them, otherwise it's a waste of time. Just want to get double effect with half effort by investing little time to learn more new words with enhanced memory.