rules of origins的用法和樣例：
例句
- They shall also include rules of origin used for government procurement and trade statistics.
還應包括用於政府採購和貿易統計的原產地規則。 - Rules of origin are the basis for a country to treat cargos differently in order to protect the advantages of its own cargos.
在世界範圍內製定並使用統一的原產地規則之前，各國仍可使用各自的原產地規則。
