短语词组短语pond microcosm 池塘微宇宙microcosm theory 微宇宙理论aquatic microcosm 水生微宇宙microcosm simulation 微生态系统模拟aquarium microcosm 水族箱微宇宙microcosm worldlet 小世界microcosm essence 微观本质mattress microcosm 沉床微宇宙microcosm experiment 缩微实验 返回 microcosm