Chinese · Pronunciation Guide
tai-YAHNG: a hard-falling first syllable with a strong puff of air, then a rising second with a back nasal.
tàiyáng
A drop followed by a climb, giving a clean V shape with no sandhi. That contour is worth practising as a unit, because a fall running straight into a rise is one of the harder transitions in Mandarin — the voice has to reach the floor and then immediately begin ascending.
Listen: 太阳
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今天太阳很好。
Jīntiān tàiyáng hěn hǎo.
The sun is shining today.
Listen: 今天太阳很好。
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今天太阳很好。 ends with hěn and hǎo adjacent, both dipping, so hěn rises. Before that, jīn and tiān hold level, tài plunges, yáng climbs. So the sentence has a plateau, a V, and then a rise-plus-dip — three quite different pitch shapes in six syllables.
Without a real puff, the t gives dài. Push the air. On the second syllable, the back nasal drifts forward to yán, which is a real and common syllable. And the V transition gets smoothed out: learners let tài stop short of the floor so that yáng has less distance to climb, which flattens the whole word.