4N-SING 一点;些微 A grain of a quality is a very small amount of it. 一点;些微
There's more than a grain of truth in that. [+ of]
其中含有很深刻的道理。
5N-SING (木材表面的)纹理,纹路The grain of a piece of wood is the direction of its fibres. You can also refer to the pattern of lines on the surface of the wood as the grain. (木材表面的)纹理,纹路
Brush the paint generously over the wood in the direction of the grain.
6PHRASE 违背本来的原则;与…格格不入 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. 违背本来的原则;与…格格不入
Privatisation goes against the grain of their principle of opposition to private ownership of industry.