一群鹅在什罗普山坡放牧这群自由放养的鹅准备在圣诞节在英国什鲁斯伯里上市。
A flock of geese graze on a Shropshire hillside as they are reared in their free-range environment for the Christmas market in Shrewsbury, England.
而由伽罗瓦和阿贝尔创立的群的结构并由克莱因提出的几何变换群理论为几何学从第二阶段到第三阶段的转变提供了依据。
The group which is founded by Galois and Abel and the theory which is proposed by Klein provide the tool from the second stage to the third stage of the geometry.
北武夷地层分区可划分出武夷群、罗塘群和圭峰群；
North Wuyi strata distributive province can be divided into Wuyi group, Luotang group and Guifeng group;
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