red ink

名词 red ink:

1. the amount by which the cost of a business exceeds its revenue
   同义词：loss, red

动词 red ink:

1. mark with red ink
   同义词：red-ink

1. Don't write your exercise in red ink.
   不要用红墨水写练习。
2. Do not write your exercise in red ink.
   不要用红墨水写你的练习。
3. How much red ink is there in the ink-pot?
   墨水瓶里有多少红墨水？
4. He has run out of red ink.
   他的红墨水用完了。