a.  蓝色的，蔚蓝色的，天蓝色的

a.  忧郁的，沮丧的，悲观的 ≈ depressed

n.  蓝色

• blue with cold  冻得发紫

• the blues  忧郁，沮丧

• When night falls, red and blue and other colors   26   a hazy (雾蒙蒙的) glow over a city lit up by tens of thousands of neon signs.

• When the students came in, sharpened pencils in hand, there was not a blue book in sight.〔美国大学生考试答题用的〕蓝皮簿

• I’ve been feeling kind of blue.

  我心情不大好。

• A lot of women get the blues after the baby is born. 许多妇女产后会感到忧郁。