within the limits of genera,most of the parts as a rule exhibit difference through contrast of the property or accident（A）,such as colour and shape,to which they are subject:in that some are more and some in less degree （B）the subject of the same property or accident;and also in the way of multitude or fewness,magnitude or parvitude,in short in the way of excess or defect.
其中A处的property和accident在这里的意思，及B处的句子的结构（in less degree后面直接跟the subject of）怎么解释？
求英语大神们赐教