The most famous successful example was the introduction of the gray moth, Cactoblastis cactorum, into Australia to control the prickly pear, Opuntia inermis, which was overrunning vast tracts of land.
Gray clustering is a feasible method to assign these floristics to their suitable area, in which assorting vegetable and delineating the clustering objects by linear features are necessary.
And this was the fifties, the grayest, bleakest, most blinkered and culturally repressive period in the entire second half of the twentieth century, especially in small-town America.
Some common troubles such as poor throwing power,burnt deposit on rim,dull gray coating,piebaldism,blue film,hazy deposit,spongy surface and roughness in decorative chromium plating were summarized.
Moreover, we also export gray, green and yellow-rust slabstones, specializing in slabstone and kallaite with the processing, manufacturing and exporting as a whole.
The rising of the sun was noble in the cold and warmth of it; peeping down the spread of light, he raised his shoulder heavily over the edge of gray mountain and wavering length of upland.
And he begins to sing. In the pure hearted voice of a 3-year-old, Michael sings: " You are my sunshine, my only sunshine, you make me happy when skies are gray" Instantly the baby girl responds.
There are swift-flowing rivers which dash through jagged canons; and there are enormous plains, which in winter are white with snow, and in summer are gray with the saline alkali dust.
著名的
是把一种
分聚类对象，并对种类繁多的植物简要分类十分重要。
的时期，也是文化上
材矮胖，留着
里，好像在等待主人骑上它。
么喜欢你
地伸展着他的臂膀，划破
块块青灰色的金属片。
册）
