但是，当内容必须动态生成，比如对于电子商务站点或由应用程序和数据库驱动的站点，静态压缩没有什么用处。

Static compression, though, is not useful when the content has to be generated dynamically, such as on e-commerce sites or on sites which are driven by applications and databases.

youdao

“动态”意味着查询作为字符串发送给数据库引擎；必须对它进行解析，并生成查询执行计划。

"Dynamic" means that the query is sent into the database engine as a string; it must be parsed and have a query execution plan generated.

youdao

此外，数据库可以更好地理解它存储的数据的状态，从而可以生成到数据的更有效和动态的存取路径。

In addition, the database can have a better understanding of the state of the data it stores, and thereby can produce a more efficient and dynamic access path to the data.

youdao