Word: 肚里 (dùlǐ)

乌龟吃了萤火虫，肚里明白

wūguī chīle yínghuǒchóng, dùlǐ míngbai

a tortoise that has eaten a firefly: its belly is bright

乌龟有肉在肚里头

wūguī yǒu ròu zài dùlǐ tou

the tortoise keeps its flesh inside

恶虎难斗肚里蛇

è hǔ nán dòu dùlǐ shé

a fierce tiger can hardly fight the snake inside its belly

打掉门牙肚里咽,有苦说不出

dǎdiào ményá dùlǐ yàn,yǒukǔshuōbùchū

a front tooth knocked out and swallowed: bitterness you can't voice

火烧乌龟,肚里痛

huǒshāo wūguī,dùlǐ tòng

a tortoise in the fire: pain in the belly

牛皮灯笼，肚里亮

niúpí dēnglóng, dùlǐ liàng

an oxhide lantern: bright inside

老母猪吃碗碴儿,肚里有瓷儿

lǎo mǔzhū chī wǎn chár,dùlǐ yǒu cí ér

an old sow eats broken bowl shards: there's china (words) in her belly

臭棋肚里有仙招

chòuqí dùlǐ yǒu xiān zhāo

in a bad chess player's belly there are immortal moves

麻雀肚里找胡豆，没那回事

máquè dùlǐ zhǎo húdòu, méi nà huíshì

Looking for broad beans in a sparrow's belly: no such thing