“一丝不苟”，汉语成语，一丝表示“a trace of something， details”，苟指“indifferent，negligent”， 不表示否定“not，negative”。“一丝不苟”的意思是指做事认真细致，一点儿不马虎，可以翻译为“ be conscientious and meticulous，be scrupulous about every detail”。

老张对工作一丝不苟，同志们都很信任他。

Lao Zhang is very conscientious in doing his work, so his comrades all have confidence in him.

我们一直在各个生产过程中保持着一丝不苟的精神。

We keep the spirit of being scrupulous about every detail in every stage of production.