“Perfect Quidditch conditions! ” said Wood enthusiastically at the Gryffindor table, loading the team's plates with scrambled eggs.

“是魁地奇比赛最理想的天气！”在格兰芬多餐桌上，伍德热情洋溢地说，一边给每个队员的盘子里都添了许多炒蛋。

Well, here, " loading up your plate" means to put a lot of food on your plate.

嗯，在这里，“loading up your plate”的意思是在你的盘子里放很多食物。