求翻译：MySQL是一个小型关系型开源数据库管理系统。由于其体积小、速度快、总体拥有成本低，且完全满足本系统数据量和数据安全的需求，我们决定选用它作为本系统的数据库系统。是什么意思？

mysql is a small relational open source database management system. Due to its small size, speed, and low total cost of ownership, and fully meet the needs of the system is the amount of data and data security, we decided to use it as the system's database system.

There is a small MySQL relational open source database management system. Because of its small footprint, fast, low total cost of ownership, and fully meet the amount of data and system data security requirements, we selected it as the system's database system.

MySQL is small relations opens the source database management system.Because its volume small, the speed quick, the overall has the cost to be low, also satisfies this system data quantity and the data security demand completely, we decided selects it to take this system the database system.

MySQL is a small open source database management system. Due to its small size, speed, and low total cost of ownership, and completely meet the needs of the system data and data security, we have decided to adopt it as the system's database systems.