Most of these functions are actually procedures, however, because they modify their list argument in-place.

大部分这些函数实际上是过程，因为它们现场修改它们的列表参数。

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Now that the mutex is unlocked, other threads can access and modify the linked list, possibly adding items.

现在互斥对象已被解锁，其它线程可以访问和修改已链接列表，可能还会添加项。

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We established the schema (loosely) and implemented a tool to add, list, modify, and delete images and comments.

我们确立了松散的模式，并实现一个工具来添加、列举、修改和删除照片和评论。

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