1、Sunflowers are heliotropic plants, meaning they turn towards the sun to maximize their exposure to sunlight.

向日葵是向太阳转动的植物，意味着它们会朝向太阳以最大化接受阳光。

2、The heliotropic behavior of certain flowers allows them to get the most amount of sunlight during the day.

某些花朵的向光行为使它们能在白天获得最多的阳光。