pineapple是可数名词吗

Analysis and forecast of chilling injury to pineapples in South Guangxi

广西南部菠萝寒害的分析及预报方法

There is a huge international market for pineapples.

菠萝有一个极大的国际市场。

Two oranges, three pears and four pineapples, please.

请给两个橘子，三个梨和四个菠萝。

By the way, the plums and pineapples look good too.

哦，这些李子和菠萝看上去也很好。

Pineapples are one of the most popular fruits in Hawaii.

菠萝是夏威夷最受欢迎的水果之一。