英语音标里像数字3的怎么读

你会发“嘘”的音吗？
卷起舌头，用“嘘”的口型发“雨”的音，就出来那个音了
希望能帮到你

It's not possible to express it in Hanyu Pinyin.

You mean the pleaSURE part and the exploSION part? It's different from the word three.

The "S" in these words are somewhat pronounced as what is in between the S sound and the Z sound.

For the word "three", the TH sound will be made when you stick your tongue in between your teeth and then try to breathe out through your mouth (or spray some saliva for that matter ;p). The rest of the word, just pronounce as usual. (:

“呃”第一声，加点儿化音就好了