The majority of the grains, about 80%, were from cereal crops like barley, and about 10% were bits of roots, including lily, which would have made the beer sweeter, the scientists say.
2017年6月四级真题（第一套）阅读 Section A
英语六级真题
But it's also in foods that may not come immediately to mind like vegetables, fruit, beans and grains.
2019年12月六级真题（第二套）阅读 Section B
Most Americans don't eat enough fruits, vegetables or whole grains.
2017年6月六级真题（第二套）听力 Section B
柯林斯高阶英汉双解学习词典释义
N-COUNT
谷粒
A grain of wheat, rice, or other cereal crop is a seed from it.
If you say that an idea or action goes against the grain, you mean that it is very difficult for you to accept it or do it, because it conflicts with your previous ideas, beliefs, or principles.