根据这个概念，我们来看看如何给并发队列的添加和取出操作增加超时限制。
Based on this idea, let's look at the concept of a concurrent queue where push and pop operations come with timeouts.
根据这个概念，水果在不同的轻松状态下，并且用使它看起来更可爱的产品水果颜色来匹配景观的背景色。
According to the concept the fruits are in different relaxing situations. Also the background colours of the landscapes match with the fruit colours to make it look a more delightful product.
这些服务依赖于一个称为重启级别(restart level)的概念，根据这个概念元素可以被任意地赋予编号级别。
These services are dependent on a concept called "restart levels" wherein elements can be arbitrarily placed in numbered levels.
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