提高了对底层数据的访问效率。

Efficient access of the underlying data.

youdao

该模型能有效降低数据冗余，提高数据访问效率。

It can reduce data redundance and improve data access efficiency.

youdao

这种方式有效减少了数据库连接的时间，提高了访问效率。

This method reduces the time of connecting to database and raises the efficiency of access.

youdao

You might say, why? Well it turns out there's some trade-offs to it. It has some advantages in terms of power of storing things, it has some disadvantages, primarily in terms of access time.

那可能是某种意义上的权衡,对存储而言，这有优势,但访问的效率上就变成劣势了,幸运的是，python或者。

麻省理工公开课 - 计算机科学及编程导论课程节选