three extras meaning in Chinese

三点须知

I found myself landed with three extra guests for dinner .
我到时候才知道我得多招待三个客人吃饭。
She is rather annoyedat having three extra guests suddenly thrust on her
因为突然多来了三个不速之客要接待,她心里直冒火
So peter gave the three extra eggs to the three little kittens as thanks for all their help
所以，皮特将三个多余的蛋送给了三只小猫作为对他们的帮助的感谢。
To make the picture appear even more real , i generated three extra layers of additional shadows and lighting effects
让一张图片看起来更真实，我一般用三个附加的图层来增加阴影和光线特效。