你写程序实际上是在写语法树-而其它语言需要编译器生成这种内部表示。

You write programs in the parse trees that get generated within the compiler when other languages are parsed.

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键生成器计算给定字符串的hash码，这个hash码被存储在DB 2内部的B -树中。

The key generator computes the hash code for the given string, and that hash code is stored in the DB2-internal B-Tree.

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