Of blue color, like clear sky or deep sea.

• Having a blue tint or look.

蓝色的。

The color blue.

• The hue of clear sky or deep ocean.

介于绿色与紫色之间的颜色。

• 蓝色的事物。

Depressed or sad.

• Feeling melancholy.

忧郁的；感到悲伤的。

Bluish from lack of oxygen; cyanotic.

• Skin appearing blue or purplish.

与以蓝色为标识的政治团体有关的。

Of a party represented by blue.

• In the U.S.: of the Democratic Party.

使某物变蓝。

• 变成蓝色。

Of meat: very rare; barely cooked.

• Seared outside, cool and nearly raw inside.

蓝灰蝶等小型蝴蝶（灰蝶科）。

To make or become blue; to turn blue.

• To take on a bluish color.

To treat steel so it resists rust; to blue.

• Apply a chemical or heat process to form a blue oxide.