GRE必備核心詞組：on the periphery of

　　on the periphery of 在……邊緣

　　釋義

　　If something is on the periphery of an area, place, or thing, it is on the edge of it.

　　例句

　　Geographically, Shanghai is on the periphery of China, while Xi'an is at the heart of the country.

　　GRE

　　If individuals on the edge of a group are more vigilant because they are at greater risk of being captured, then individuals on average would have to be more vigilant in smaller groups, because the animals on the periphery of a group form a greater proportion of the whole group as the size of the group diminishes.

　　如果隊伍邊緣的個體會因為容易被擒獲而保持更高的警惕，那么一般來說隊伍規(guī)模越小體會們更警惕，因為當整體規(guī)模縮小時，處在邊緣的個體所占的比例上升了。