2018-12-28

1.Material

Without lifesaving measures, the brain starts to die within four to six minutes.

/wɪˈθaʊt/ /ˈlaɪfˌseɪvɪŋ/ /ˈmɛʒərz/, /ðə/ /breɪn/ /stɑrts/ /tu/ /daɪ/ /wɪˈðɪn/ /fɔr/ /tu/ /sɪks/ /ˈmɪnəts/.

2. Facts 

[eɪ]

结束发音时,颚部慢慢抬起,嘴唇慢慢合上,可以感觉到舌部肌肉紧张

[ʊ]

要点:双唇收圆,稍稍向外突出;短元音,发音时嘴形小而圆,嘴角肌肉放松

[ɑ:]

舌身后缩,舌尖远离下齿

[aʊ]

[a]音后舌尖离开下齿,舌身后缩,舌后部向软腭抬起,发音慢慢滑向[ʊ]

[aɪ]

[a]音要发足,过渡部分与[eɪ]类似

3.Comments

[eɪ]不好发

4. Hours 

练习0.5h.

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