The complexity in concurrency programming stems from the fact Threads often needs to operate on the common data. Each Thread has its own sequence of execution, but accesses common data.
并发的复杂性在于，线程需要经常访问共同数据，每个线程都有自己的执行顺序，但需要访问共同数据。
In the deep-request sequence (assuming a database connection is needed), these aspects of database connection pooling can be affected by allowing more threads.
在深请求序列中(假设需要数据库连接)，数据库连接池的这些方面可能会由于允许多个线程而受到影响。
In a concurrent model of execution, an application is divided into two or more processes or threads, each executing in its own sequence of statements or instructions.
在并发执行模型中，应用可被划分为多个进程或线程，每个进程和线程都有专属的、单独运行的语句或指令序列。
In a concurrent model of execution, an application is divided into two or more processes or threads, each executing in its own sequence of statements or instructions.
在并发执行模型中，应用可被划分为多个进程或线程，每个进程和线程都有专属的、单独运行的语句或指令序列。
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