Temporal and spatial variation of phytoplankton structure in the lake was studied. 摘要研究了武汉东湖浮游植物群落结构的时空变化。
The change type describes the semanteme of increment information and data delta describes the content of increment information. 提出了基于时空变化类型和数据差的增量信息概念，变化类型描述增量信息的语义，数据差表达增量信息的内容。
