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yī bù xiǎo xīn

一不小心

to be a little bit careless; to have a moment of inattentiveness; accidentally

HSK 7+ · Frequency 3.3

Meanings

  • accidentally; if one is not careful; by accident

Example sentences

  • 他开车一不小心就撞上了护栏。
  • 做实验千万小心，一不小心就会出错。
  • 走路看手机，一不小心就摔倒了。