"black walnut kernels are difficult to get out of the shell"
"the gist of the prosecutor's argument" "the heart and soul of the Republican Party" "the nub of the story"
误 A meat is nourishing.
误 Meats are nourishing.
正 Meat is nourishing.
析meat作为肉食的统称时为不可数名词,因此不能用a,也没有复数。