回複：馬同學and Bill, 俺又錄了這個詞，幫咱再聽聽，這回對不對

scale - excellent pronounciation.
chain - not satisfactory. It still have sound of /i:/ or /i/.
Try to pronounce it as /ei + i/ for Chain.
When pronouncing the /ei/, 嘴張大，並向左右鋪開。