Naturalists are concerned that diminishing wetlands are leading the water birds to overpopulate this refuge. 自然主义者博物学家担心,逐渐减少湿地是第一位的对水禽的影响,形成人口过密的避难所。
Reptiles, amphibians, diving birds, and diving and burrowing mammals may have a prolonged time to loss of consciousness with inhalant gases. 爬行动物,两栖动物,水禽,以及洞穴哺乳动物在使用吸入气体的时候也可能需要更长的时间以失去知觉。
Some water birds skittered over the lake. 几只水鸟飞掠过了湖面。
She saw a water bird flying overthe lake. 她看到一只水鸟从湖上飞过。