No matter what the answer is, it's time to make a guess, as in Listing 10.
无论答案是什么，现在都该做出猜测了，见清单10。
The four lines of code at the bottom of Listing 1 prove that no matter how many times you ask for an instance of the ConnPool pool class, it will always return the same object.
清单1底部的四行代码则证明无论请求ConnPool池类的一个实例多少次，它都会返回相同的对象。
Adding it to your schema is a matter of importing the appropriate namespaces and documents (see Listing 3).
导入正确的名称空间和文档即可将该库添加到模式中(见清单3)。
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