I don't exactly know what it means to be ready. A cake when the oven timer goes off? Am I fully baked, or only half-baked?

I don't exactly know what it means to be ready. A cake when the oven timer goes off? Am I fully baked, or only half-baked?

我不知道准备是什么意思。烤箱定时器一响，蛋糕就来了?我是完全烤熟了，还是半生不熟?

-- Jessica Savitch 杰西卡·沙维奇