be conscientious and meticulous 一丝不苟

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，一点儿不粗心，可以翻译为 be conscientious1 and meticulous，be scrupulous2 about every detail。

老张对工作一丝不苟，同志们都非常信赖他。

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

大家一直在每个生产过程中维持着一丝不苟的精神。

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