一针一线的英文：
[Literal Meaning]
one/needle/one/thread
things as trivial as a needle and a thread

[解释]
一枚针和一根线。比喻极微小的东西。

[Explanation]
trivial things

[例子]
一针一线我们都要爱惜，保持勤俭节约的好习惯。

[Example]
We shall cherish trivial things and keep the good habit of thrifty.

A single needle or a piece of thread
一针一线