A conclusive or critical test, as used to determine the worth, quality, or effectiveness of someone or something. The phrase comes from the 19th-century practice of testing metals in nitric acid to determine if they contained gold.Restructurin
تعلم 3 مصطلحات1. A dime a dozen = something available a lot in one place and rare in another. 2. Adding insult to injury = to make a situation even worse. 3. Bite the bullet = to do something unwillingly and with hesitation.