sunny本身作形容词。
sunny：adj.阳光充足的；欢乐的；快乐的；
例如：Elsewhere, the weather today has been fairly sunny.
相关介绍
It will be hard to work today ─ specially when it's so warm and sunny outside.
今天无心工作——尤其是外面这样风和日丽。
It's bound to be sunny again tomorrow.
明天肯定又是阳光灿烂。
Place the plants on a sunny windowsill.
把这些植物放在阳光充足的窗台上。
