bù shuǎng
not well
out of sorts
in a bad mood
without discrepancy
accurate
bào yìng bù shuǎng
appropriate retribution (idiom)
háo lí bù shuǎng
not to deviate an iota (idiom)
to be extremely accurate
háo fà bù shuǎng
not to deviate one hair's breadth (idiom)
to be extremely accurate