"The sun is shining brightly" 是表示 "阳光很灿烂" 的常用英文表达。
其中 "sun" 是指太阳，"shining" 是指发光的，"brightly" 是指灿烂的。
例句：
The sun is shining brightly today, let's go for a picnic. (今天阳光很灿烂，我们去野餐吧)
I woke up to the sun shining brightly in my room. (我醒来时，房间里阳光灿烂)
The sun shining brightly on the water made it look so beautiful. (阳光照射在水面上，使水看起来非常美丽)