If these two elements were implemented as one monolithic piece of code, it might be a bit tricky to read, because there are several things going on at the same time.
如果这两个元素是在一个代码片段中实现的，那么代码可能不太容易读懂，因为同时发生的事情很多。
Since transaction types are identified by two - or three-bit numerical or character code, a large company or small business needs to associate a business transaction category for each type.
由于事务类型由两位或三位数值或字母代码标识，因此大公司或小公司需要关联每种类型的业务事务类别。
When a character is represented using a sequence of two 16-bit code units, it's called a surrogate pair.
当使用两个16位代码单元序列表示字符时，将该字符称为代理对。
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