1 complete change from the normal state (idiom); quite uncharacteristic
2 entirely outside the norm
3 out of character
一问三不知
yī wèn sān bù zhī
1 lit. to reply "don't know" whatever the question (idiom)
2 fig. absolutely no idea of what's going on
3 complete ignorance
一夔已足
yī kuí yǐ zú
1 one talented person is enough for the job (idiom)
一失足成千古恨
yī shī zú chéng qiān gǔ hèn
1 a single slip may cause everlasting sorrow (idiom)
一望而知
yī wàng ér zhī
1 to be evident at a glance (idiom)
一无所知
yī wú suǒ zhī
1 not knowing anything at all (idiom); completely ignorant
2 without an inkling
一知半解
yī zhī bàn jiě
1 lit. to know one and understand half (idiom); a smattering of knowledge
2 dilettante
3 amateur
一叶知秋
yī yè zhī qiū
1 lit. the falling of one leaf heralds the coming of autumn (idiom)
2 fig. a small sign can indicate a great trend
3 a straw in the wind
三纲五常
sān gāng wǔ cháng
1 three principles and five virtues (idiom)
2 the three rules (ruler guides subject, father guides son and husband guides wife) and five constant virtues of Confucianism (benevolence 仁, righteousness 義|义, propriety 禮|礼, wisdom 智 and fidelity 信)
不当家不知柴米贵
bù dāng jiā bù zhī chái mǐ guì
1 a person who doesn't manage a household would not be aware how expensive it is (idiom)
不知丁董
bù zhī Dīng Dǒng
1 forgetting the fate of Ding and Dong (idiom)
2 unheeding the lessons of the past
不知好歹
bù zhī hǎo dǎi
1 unable to differentiate good from bad (idiom)
2 not to know what's good for one
3 unable to recognize others' good intentions
不知所措
bù zhī suǒ cuò
1 not knowing what to do (idiom); at one's wits' end
2 embarrassed and at a complete loss
不知死活
bù zhī sǐ huó
1 to act recklessly (idiom)
不知轻重
bù zhī qīng zhòng
1 lit. not knowing what's important (idiom); no appreciation of the gravity of things
2 naive
3 doesn't know who's who
4 no sense of priorities
不知进退
bù zhī jìn tuì
1 not knowing when to come or leave (idiom); with no sense of propriety