Each piece has its own rules. But it is easy actually.

每个棋子都有自己的规则，其实很简单。

youdao

The evolution of spatial economic structure has its own rules.

区域经济空间结构演变有其内在的规律。

youdao

Just like what I said, every society has its own rules to work.

正如我之前说的那样，每个社会都有自己的规则。

youdao

It has its own structure and set of rules that apply in it."

VOA: standard.2010.07.16

But each trust has its own rules, and each family has its own idiosyncrasies.

FORBES: Tax Hikes Hit Trusts Hard, Beneficiaries Pull Money Out

Handwerk, which embraces 150 trades from bakery to plumbing and employs 5.1m, has its own rules.

ECONOMIST: German services

Each has its own rules of communication, or patterns of behaviour, and neither can be blamed, they say, when clashes occur.

BBC: What Paddington tells us about German v British manners