Whenever the predicted symbol is unique, there is no need to encode it as the decoder generates the same model from the DTD and thus can generate the unique expected symbol.
只要预测到符号是独特的，就不需要对其进行编码，因为解码器从DTD生成相同的模型，从而可以生成独特的预期符号。
A semantic model is created by feeding a syntax tree back into the compilation so that it will be annotated with symbol data. The semantic model can then be queried for information such as.
他们可以通过把语法树回馈给编译集来创建语义模型，从而用符号数据对其进行注解。
We used this model to create an AJAX-style client that updates the stock price as you type in the ticker symbol.
我们使用这一模型来创建一个AJAX方式的客户端，它通过您输入的符号更新股票价格。
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