在现实世界中，此标准可能难以应用到相距遥远的种群，由地理环境分隔的种群，或是植物种群（化石显然也无法繁殖）。
Inpractice, this standard can be difficult to apply to organisms isolatedby distance or terrain or to plants (and, of course, fossils do notbreed).
二者存在的差异性主要是由彼此赖以生存的文化语境和自然地理环境的差别引起的。
While the causes of the differences are mainly from two aspects: broader cultural context as well as natural and physical environment.
该景观建筑是由三个要素组成：白色大理石，植被和水体，创造了一个陆地-海洋地理环境。
The landscaped building is made of three elements: white marble, vegetation and water, creating a land-liquid geology.
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