千差万别 thousands of differences
Explanation
千差万别，是指事物之间存在着很大的差异，形容种类繁多，各不相同。它强调事物之间具有多样性和不可比拟性。
Thousands of differences, refers to the fact that there are big differences between things, it describes many types, each different. It emphasizes the diversity and incomparability of things.
Origin Story
在古代，有一位名叫李白的诗人，他喜欢游山玩水，常常带着酒壶和琴去各个地方。一天，李白来到一座高山，准备登顶欣赏风景。他看到山间花草树木，形态各异，颜色缤纷，不由地感叹道：“这世间万物，千差万别，真是美不胜收！”
In ancient times, there was a poet named Li Bai who loved to travel around and enjoy the scenery. He often carried a wine bottle and a zither with him to various places. One day, Li Bai came to a high mountain and prepared to climb to the top to admire the view. He saw the flowers, trees and plants in the mountains, with different shapes and colors, and couldn't help but exclaim:
Usage
这个成语用来形容事物之间差异很大，种类繁多，没有相同的。可以用在描述不同事物之间的差异，比如：
This idiom is used to describe the great difference between things and the variety of types, there is no same. It can be used to describe the differences between different things, for example:
Examples
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不同人的审美观千差万别。
bù tóng de rén de shěnměi guān qiān chā wàn bié.
Different people have different aesthetic tastes.
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虽然都是同一款手机，但配置却千差万别。
suīrán dōu shì tóng yī kuǎn shǒujī, dàn pèizhi què qiān chā wàn bié.
Although they are all the same model of mobile phone, the configurations are very different.
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每个人对未来的规划都千差万别，没有统一的标准。
měi gè rén duì wèilái de guīhuà dōu qiān chā wàn bié, méiyǒu tǒngyī de biāozhǔn.
Everyone has their own plans for the future, there is no unified standard.