Use a black pen on white paper to ensure good reproduction.
用白纸黑笔，以确保复印清晰。
She's been in a really black mood all day.
她一整天都心情很坏。
One cat is black and white, the other solid black.
一只猫是黑白花色的，另一只猫是纯黑色的。
The company viewed the venture as a financial black hole.
公司认为该项投资是财政上的一个大黑洞。
The hill appeared as a black mass in the distance.
远远地看去，那座山是黑魆魆一片。