sister的音标怎么读？

sister 英 ['sɪstə] 美 ['sɪstɚ]例句：She brought her sister to my office.她把她妹妹带到我办公室。I regarded her as my own sister.我把她看做自己的妹妹。She cried out with pleasure when she saw her little sister.当她见到小妹妹时她高兴得叫喊起来。S...