向日葵在英语中被称为"sunflower"。这个词来源于拉丁语，由两个词组成："sol"和"flos"，分别代表"太阳"和"花"。因此，"sunflower"的意思就是"太阳的花"。

例句：

The sunflower is a type of flowering plant. (向日葵是一种开花植物。)

Sunflowers are known for their tall, sturdy stems and their large, vibrant yellow petals. (向日葵以其高大坚实的茎和大而鲜艳的黄色花瓣而闻名。)

The sunflower is the national flower of Ukraine. (向日葵是乌克兰的国花。)