unexpectedly
To be unprepared means to be unprepared. It comes from the sixth chapter of Yang Yuru's Xinhai Revolution: the Qing army was caught off guard and retreated.
Idiom explanation
It means that things come suddenly and make people unprepared.
The origin of Idioms
Source: the sixth chapter of Yang Yuru's Xinhai Revolution is "the two bridges of Qing army's retreat.".
Analysis of Idioms
Caught off guard
Chinese PinYin : zhòu bù jí fáng
unexpectedly
make foreign things serve China. yáng wéi zhōng yòng
deep in the night and all is quiet. gēng shēn rén jìng