bluer , bluest
If you are feeling blue, you are feeling sad or depressed, often when there is no particular reason.
There's no earthly reason for me to feel so blue.
我完全没有理由感到如此低落。
Something that is blue is the colour of the sky on a sunny day.
There were swallows in the cloudless blue sky.
燕子在无云的蓝天上飞翔。
She fixed her pale blue eyes on her father's.
她淡蓝色的眼睛盯着她父亲的双眼。
blues
The blues is a type of music which was developed by African American musicians in the southern United States. It is characterized by a slow tempo and a strong rhythm.
Can white girls sing the blues?
白人女孩会唱蓝调吗?