Perhaps the most difficult challenge is collecting the related code from multiple source files; development tools can greatly expedite this task.

或许最困难的挑战在于从多个源文件收集相关代码；开发工具可以极大地加快这个任务的进行。

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Perhaps the most difficult challenge is collecting the related code from multiple source files; development tools can greatly expedite this task.

或许最困难的挑战在于从多个源文件收集相关代码；开发工具可以极大地加快这个任务的进行。

youdao