This is a diphthong, a double-vowel sound. The shape the mouth makes changes from the beginning of the sound to the end.
這是一個複合元音，雙元音。嘴的形狀從這個音的開始一直到最後都要變化。
It's pronounced/əʊ/. Did you notice how my mouth changed shape?
它的發音是/əʊ/。你注意到我的嘴型是怎麼變化了嗎？
Watch. /əʊ/ Now you try. Listen, watch and repeat after me: /əʊ//əʊ/.
注意觀察。/əʊ/現在你來試一試。仔細聽，注意觀察然後跟著我讀：/əʊ//əʊ/。
Now here are some words that have the/əʊ/sound: boat, show, know. Now you try. Listen and repeat after me: boat, show, know.
現在這裡有一些含有/əʊ/音的單詞：boat，show，know。現在你來試試。仔細聽然後跟我讀：boat，show，know。
Good. . . . . . .
不錯。
For speakers of some languages it may be difficult to tell the difference between the diphthong/əʊ/and the long vowel /ɔː/.Listen carefully to hear the difference. For each example I shall say the word with the diphthong /əʊ/ first.
有一些語言的使用者可能會覺得很難區分複合元音/əu/和長元音/ɔː/。仔細聽其中的區別。每一組例子我會先讀有複合元音/əʊ/的單詞。
coat-caught dough-door sew-saw flow-floor
現在你來試一下。再聽一遍然後跟著我讀：coat-caught，dough-door，sew-saw，flow-floor。很好。
Now you try. Listen again and repeat after me: coat-caught, dough-door, sew-saw, flow-floor. Good.
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