His code is messy because he does not follow best practices and never makes use of object-oriented programming (OOP).

因为从不进行实践检验，和应用面向对象程序设计(OOP)，他的编程都混乱不堪。

youdao

Harry, there is never a perfect answer in this messy, emotional world. Perfection is beyond the reach of humankind, beyond the reach of magic.

哈利，在这个错综复杂的情感世界中是找不到完美答案的，完美是世人触不可及的，它也超越了魔法。

youdao

Their hair will NEVER be messy; it will always recover after a swish or two (Are they using Pantene shampoo?).

发型高度定型，甩一甩就> 恢复（用潘婷的？）

youdao

Investing has never been an exact science, rather a messy one.

FORBES: Stock Analysts Stink

The result is a messy masterpiece, a portrait of turbulent transition, that constantly risks falling on its face but almost never does.

ECONOMIST: Fantasy with a moral