资源，与变量极为相似，但是一般是粗粒度的。

Resources, which can be best compared to variables, but are typically coarse grained.

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虽然原子变量类表面看起来与清单1中的SynchronizedCounter例子一样，但相似仅是表面的。

While the atomic variable classes might look superficially like the SynchronizedCounter example in Listing 1, the similarity is only superficial.

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出现的变量有些是十分相似的，例如Tag Library变量，id和value。

Some of the variables that appear should be familiar, such as the Tag Library variables, id and value.

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