“sick”是生病的，“dog”是狗，但“sick as a dog”我猜你不懂哟！
To describe a person's serious illness, they say "sick as a dog". 它还有暗喻指”处在麻烦中，陷入困境的情况“。有点像我们常说的水深火热，当然你还可以用be in hot ...