Word processing systems are designed to handle hyphenation in various ways, one of which may call for the use of an exception dictionary.
在字（词）处理系统中设计有各种处理连字符的方法，其中的一种需要使用一种例外字典。
If the key doesn't exist in the dictionary, an exception is thrown.
如果在字典中不存在该键，就抛出一个异常。
In almost every case (the notable exception being string ), a list function applied to a dictionary behaves as if the function had been passed a list of the values of the dictionary.
几乎在所有的情况(最显著的例外是string)下，一个应用到字典的列表函数的行为就像该函数收到了该字典的一个值列表。
You need to obtain a value from a dictionary, without having to handle an exception if the key you seek is not in the dictionary.
你需要从字典中获得一个值，不要处理在字典里找不到你所需要的键值的异常。
This method avoids throwing an exception if the entry is not currently in the dictionary.
如果字典中当前没有该项，则此方法可避免引发异常。
This method avoids throwing an exception if the entry is not currently in the dictionary.
如果字典中当前没有该项，则此方法可避免引发异常。
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