一丝不苟yìsī-bùgǒumeticulous; scrupulous; strictly thoroughHSK 7-9Pronunciationyìsī-bùgǒuExample sentence他做实验时一丝不苟,每一步都反复核对。tā zuò shíyàn shí yìsī-bùgǒu, měi yí bù dōu fǎnfù héduì.He is meticulous when conducting experiments, double-checking every single step.Read and choose an answerOne fixed sampleExplore a sample