橙子的英文复数形式是 'oranges'。

Orange is a popular fruit all over the world. It is sweet, juicy, and packed with nutrients like vitamin C and fiber. When we talk about more than one orange, we use the plural form 'oranges'. For example, 'I bought three oranges at the grocery store today.'

The word 'oranges' is formed by adding the letter 's' to the end of the singular form 'orange'. This is a common way to form the plural of most English nouns. However, there are some exceptions to this rule, such as words that end in 'ch', 'sh', 'x', and 's', which require an additional 'es' at the end.

In addition to being a delicious and healthy fruit, oranges are also used in many different ways. They can be juiced, sliced, or peeled and eaten whole. Orange zest, the outermost layer of the peel, is often used as a flavoring in cooking and baking. Oranges are also a popular ingredient in salads, smoothies, and desserts.

Overall, oranges are a versatile and tasty fruit that can be enjoyed in many different forms. Whether you prefer them whole, sliced, or juiced, there's no denying that oranges are a delicious addition to any meal or snack. And now that you know the plural form of 'orange' is 'oranges', you can impress your friends with your English skills the next time you talk about this juicy fruit!