A device that offers small invertebrates two or more contrasting environments (e.g. differing in humidity, temperature, illumination, or pH) and allows them to move freely into the one they prefer.
壹個為小型無脊椎動物提供了兩個或更多形成鮮明對比的環境的裝置（如濕度、溫度、光照、PH值不同），並使它們能夠自由移動到更喜歡的環境。