valkenburghCOCA¹⁴³⁴⁵¹ 基本例句 🌏瓦尔肯堡 Dr Van Valkenburgh suggests one possibility is that the density and diversity of carnivores were higher in the past. 范博士指出，一个可能的原因是远古食肉动物的生存密度更高，物种更多样。 ecocn Dr Van Valkenburgh studied36 living carnivores, ranging from weasels to tigers, to determine the frequency of tooth breakage. 范博士为了得到牙齿断裂频率，研究了36种活的食肉动物——小到鼬鼠，大到老虎。 ecocn