amplifer stage

例句：

1. 1. The amphibians are known for their ability to survive in both aquatic and terrestrial environments.
   两栖动物因其在水生和陆生环境中生存的能力而闻名。
2. 2. During the amphibian stage, animals like frogs and toads spend most of their time on land.
   在变态期，像青蛙和蟾蜍这样的动物大部分时间都在陆地上度过。
3. 3. The amphibian stage is crucial for the development of many species, as it allows them to adaptto different environments.
   变态期对于许多物种的发展至关重要，因为它允许它们适应不同的环境。