Each plate of food was weighed before it went out to a customer and when it came back to calculate how much food was left over.
每个盘子的食物在正式端上桌之前都被称了重量,在客人用餐完毕后,盘子被端了回来,研究者们又称取了剩下食物的重量。
When it came back positive, I felt old, scared and angry.
测试结果呈阳性,对此我既惊且怒,并感到自己一下子苍老不少。
That is the fundamental idea that may seem simple and obvious to you, but it certainly wasn't back when the idea first came up.
刚才讲的就是最基本的概念,可能看起来比较简单明显,但这些概念刚出现时并不被广泛理解
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