go over: If you go over a document, incident, or problem, you examine, discuss, or think about it very carefully. 研究,审阅,检查
He went over the plans again and discovered two mistakes.
他再次审查计划,发现两处错误.
be in the black: to have money, for example in your bank account 有盈余;有结余
The company has managed to stay in the black for the year ending December 31. 到 12 月 31 号为止的这一年里,公司努力保持着赢利状态.