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1·The reference must exist in the test and precede the conditional block.

这个引用必须存在于测试中并且在条件块前。

2·Finally, the string type is a reference type, so every string instance refers to an additional block of memory to hold the actual string data.

最后，字符串类型是引用类型，因此每个字符串实例都引用一个附加的内存块，以存放实际的字符串数据。

3·In most cases, a conditional block issues user input actions depending on the value of a reference.

大多数情况下，一个条件块依靠一个引用的值发出用户输入动作。

4·Here's why this could happen: the metadata update would erase any reference to the original data block(s), but would point to data block(s) on disk that were never filled with data.

出现这种情况的原因如下：元数据更新删除了对原先数据块的任何引用，却指向磁盘上没有填充过数据的数据块。

5·Groovy also implements the handy default behavior of automatically supplying a parameter for your iteration named it, which you can reference within the code block.

Groovy还实现了方便的默认行为，为名为it的迭代自动提供参数，您可以在代码块中引用。

6·ActionScript also requires a reference to other packages (libraries) in order to use them; hence the import statement at the top of the Script block.

ActionScript在使用一个包(库)之前，先要进行引用，所以例中脚本块的开头有一行“ import ”语句。

7·Once the message has been sent, the sender can store a reference to the Future object and check periodically for completion, or it can block and wait if needed by calling the get method.

消息被发送之后，发送者可以保存对Future对象的一个引用并定期检查是否完成，或者，它也可以通过调用get方法来阻塞和等待。

8·Memory blocks can be reached in one of two ways -- if the user program holds a reference to that block in a root, or if there is a reference to that block held in another reachable block.

可以以两种方式之一访问内存块 ―― 或者用户程序在 根 (root)中有对这一内存块的引用，或者在另一个可到达的块中有对这个块的引用。

9·If the reference that the conditional block will use for input does not exist, create it (as explained in the article on adding dynamic data to your Web service tests in the Resources section).

如果条件块为了输入而使用的引用不存在，那么就创建它(这在参考资料部分的文章adding dynamic data to your Web service tests中有解释)。

10·The reference tag is useful for catching mis-writes of data to an incorrect block, where the application tag can be used to catch other errors in the software stack.

参考标记对于捕获对不正确块的错误写入非常有用，其中应用程序标记可用于捕获软件堆栈中的其他错误。