当辅音[p,t,k]出现在非重读元音前或[s]之后时,是不送气音(unaspirated sound),如pupil[′pju:pl],prety[′priti], taking [′teiki ]或sport [sp t], stand[stend], sky[skai]等。
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短语
送气音和不送气音
Aspirated and unaspirated consonants
;
the aspirated and unaspirated
清不送气音
voiceless unaspirated consonant
不送气塞音
unaspirated stop