The following video demonstrates each syllable of the pinyin structure
and the exercise of pinyin/zhuyin with basic Chinese 4-tune pronunciation

Mandarin pinyin tunes
Click the framed calligraphic Chinese symbol icons
to link more related multi-character Chinese words!

luān, luán, luǎn, luàn

second tune

luán

twin 孿 luán

twin; born as twins 孿生 luán shēng
twin 孿 luán	born 生 shēng

Chinese characters also pronunced luán

third tune

luǎn

ovum; egg; roe 卵 luǎn

fish roe; fish eggs 魚卵 yú luǎn
fish 魚 yú	roe; egg 卵 luǎn

fourth tune

luàn

chaos; disorder; anarchy 亂 luàn

turbulence wind shear; air turbulence 亂流 luàn liú
chaos; disorder 亂 luàn	flow 流 liú