I'm full. 我吃饱了. I'm stuffed. 我吃得很饱. I can't eat another bite. 我一口也吃不下了. I ate too much. 我吃太多了. I need a rest. 我需要休息一下. I need to take it easy. 我需要轻松一下. I'll gain weight. 我会变胖. I'll get fat. 我会变肥. I need to walk it off. 我需要散散步来消耗.