千里之行始于足下的英文：
[Literal Meaning]
thousand/mi le/aux./trip，beg in/at/foot/underneath
A journey of a thousand miles begins with a single step.

[解释]
走一千里路，是从迈第一步开始的。事情成功，是从小到大逐渐积累的结果。

[Explanation]
One goes far little by little.

[例子]
千里之行，始于足下。让我们一步一个脚印，从最基础的实验做起。

[Example]
One goes far little by little. let's start from basic experiments and proceed step by step.

[英文等价词]
Great oaks from little acorns grow.
a thousand-li journey begins with the first step, the highest eminence is to be gained step by step