算術(shù)運算的用法和樣例：
例句
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用來(lái)分隔或組織計算機程序元素或數據元素的字符或字符串。例如括號、空格符、算術(shù)運算符、if（如果）、“BEGIN＂等。
A string of one or more characters used to separate or organize elements of computer programs or data; for example, parentheses, blank character, arithmetic operator, if, "BEGIN".
