arbo 发表于 2012-3-5 12:36 ; }& V. x" ^- C2 I T% k4 B
Agree with Lastman. Duck and luck, you need to relax. Dock and lock, you need to be a little bit tig ...
jsw 发表于 2012-3-14 20:05 6 J1 t v: r' Z! T$ [; s9 M' d
我个人有时候不太能分清紧张和松弛的意思,所有避免用这些词描述。4 l. R* |7 f+ R# y
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duck和dock的元音音素是不同的: