Meaning of dǎn:
胆
gall bladder; courage; guts; gall; inner container (e.g. bladder of a football, inner container of a thermos)
Yīshēng shuō tā de dǎn náng xūyào shǒushù.
医生说他的胆囊需要手术。
The doctor said his gall bladder needs surgery.
Tā yǒu hěn dà de dǎn liàng miàn duì kùn nán.
他有很大的胆量面对困难。
He has great courage to face difficulties.
Tā biǎoxiàn chūle jí dà de dǎn liàng.
他表现出了极大的胆量。
He showed great guts.
Tā yǒu hěn dà de dǎnliàng màoxiǎn.
他有很大的胆量冒险。
He has a lot of courage to take risks.
Zhège rèshuǐpíng de nèi dǎn hěn hòu, kěyǐ cháng shíjiān bǎowēn.
这个热水瓶的内胆很厚,可以长时间保温。
The inner container of this thermos is thick, allowing it to retain heat for a long time.