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

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

Each kind of music has its own rules and "speaks" to us in its own way.

每种音乐都有它的规则，并且用它独特的方式向我们诉说。

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