1.block release (到高校進行一周或幾周的)短期脫產進修
例句:We are short-staffed at the moment as two of our team are on block release.
我們目前人手不足,因為小組里有兩人脫產學習。
2.black economy 黑市經濟(指為逃稅而隱瞞收入的地下經濟)
例句:The part of an economy which is not declared to the tax authorities is known as the black economy.
不向稅務部門申報的經濟領域被稱為黑市經濟。
3.Black Friday (尤指經濟領域內災難性的)黑色星期五,災難性的一天
4.Black Monday (股市狂跌的)黑色星期一
5.blue chip 藍籌股、績優股
例句:She put her money into blue chips.
她把錢投資在績優股上。