It is possible to encapsulate very complex logic without worry about about concurrent accesses.
可以可能地封装十分复杂的逻辑，而不需要担心并行访问。
It had good ANSI SQL support, referential integrity, and good performance as long as the number of concurrent accesses didn't grow too large.
它有很好的ANSI SQL支持和引用完整性，并且只要并发用户的增长不太大它可以保持良好的性能。
The system must manage large-scale distributed storage of data, support a large number of concurrent accesses, and provide different services for different users.
该系统需要管理大规模分布存储的数据，需要支持大量用户同时快速地并发访问，需要为不同的用户提供不同的服务。
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