请帮忙翻译：“早上买好午餐，如果你不想中午在人山人海的饭堂中挤来挤去的话。”

Preparing your lunch in the moring ,if you do not want to stay in a crowded dinning hall（学校的食堂的话还是不用restaurant餐馆这个意思的好）.

buy your lunch beforehand in the morning, if you don't want to elbow your way to get it at noon (in the dining-hall).

Please,prepare your lunch ,if you do not want to have lunch in a crowded restaurant.

不确定啊,没人来讨论讨论吗

You'd better get lunch in the morning,if you don't want to travel among crowed people in dining room at noon.