若说某个局面是black and white，那意思就黑白分明，很容易判别错与对。
- I‘m really sure about some things. I think free education for all is a black and white issue.
- The question of nuclear power isn‘t black and white. Many people believe it is the only way to produce a large amount of clean energy – but many others think it has considerable dangers.
值得注意的是，短语in black and white的意思是白纸黑字，常用来形容某事被写下来作记录。
- I couldn‘t believe I had won the lottery, but when I checked my bank statement there it was in black and white: one million dollars!