第一句：The service is too slow.
A: Can you tell me what's wrong, sir?
B: The service is too slow and the dishes are served cold.
A: I see. I'll report to the manager.
第二句：There is too much salt in the soup.
A: Is everything to your satisfaction?
B: Yes, all the food was delicious except that there is too much salt in the soup.
A: I'm so sorry for that. I'll take it to the kitchen and get you another one, if you like.
若饭菜质量有问题，可向服务员提出意见。还可以用“There's something wrong with...” 这个句型表示“某事或某人有点儿不对头。”
The meat is underdone. 是说肉没熟，而overdone则是“过头了”；
I'm afraid this is too salty for me. 我觉得菜太咸了。
too sweet 太甜；That's not what I ordered. 那不是我点的。
要提意见，应该说：I want to make a complaint.