在群落交错区范围内,通常划定群落片段的边界并不太困难.The delimitation of stands within ecotons generally gives on difficulties.对于陆地群落,最主要是可用性和温度.For terrestrial communities the principal variables are availability and temperature.动物群落与沉积环境有直接关系.F...
那老人只是这个企业的挂名的总裁.The old man is only the nominal head of the business.国王仅仅是挂名的首脑, 总统才真正握有实权.King is just a figurehead; it's the president who has the real power....