all cats are grey in the dark
定义
这个短语的意思是在黑暗中，外表并不重要。
这句话出自本杰明·富兰克林。
例句
I really don't care if she is ugly. All cats are gray in the dark.
定义
写下来
示例
My conditions to accept the job were in black and white in the contract.
black and blue定义
浑身淤青
示例
He was black and blue the day after the accident
black sheep定义
家庭或团体中声名狼藉的成员，害群之马。
示例
They say he's the black sheep of the Bakers.
black-and-white定义
当你对某些情况有一种过于简单化的看法，而实际上情况更为复杂时，你就会这么说。
例子
I think terrorism isn't a black-and-white issue.
feel blue定义
感到悲伤。
示例
She felt blue after her divorce.
green light定义
允许继续进行某事，如一个项目。
示例
As a result of the severe drought, the government has given the green light for importing cereals.
in the pink定义
健康。
例子
He has been in the pink since he decided to go on a diet and exercise regularly.
out of the blue定义
完全出乎意料的事。
例子
She sent him a letter, out of the blue, telling him that she was in love with another guy.
red handed定义
在做了错事或违法的事情后被发现
例子
She was caught red-handed, stealing a ring.
red ink定义
经济损失的委婉说法。
例子
There is too much red ink in the company's financial statement.
run a red light定义
to run a red light这个短语是一个习语，意思是继续开车穿过十字路口，遇到红灯不停车。
例子
I was so late to work and to make matters worse I got a ticket for running a red light yesterday.
