back room
n
1 (esp unimportant) room at the back of a building 後室(位於建筑物後部的房间, 尤指无重要用途的).
2 (idm 习语) ,back-room `boys (infml 口 esp Brit) scientists, engineers, research workers, etc who receive little public attention 在幕後默默工作的科学家、工程师、研究人员等.
It had been baked by a college student who had used over 1,000 pounds of flour, 800 pounds of sugar, 200 pounds of fat, and 400 pounds of various other ingredients.