转自知名语言学博客 All Things Linguistics。为保持原味，直接上英文咯：
BREAKING NEWS – I finally understood the tones in Mandarin !!!
I repeat – I GOT HOW TO PRONOUNCE AND DIFFERENCIATE THE MOTHERFUDGING TONES
Thanks to the explanations of the picture I’m putting here. So helpful.
情不自禁地跟读起来~