该操作等待一个字符串，被解释为股票的报价机符号，然后返回当前该股票报价，一个浮点值。

This operation expects a string, to be interpreted as a ticker symbol for a stock, and returns a current quote for that stock, a float value.

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通常支持的类型有整数、Boolean、ASCII字符串、双精度带符号浮点数、日期时间、集合、列表、属性。

In general supported types are Integer, Boolean, ASCII string, double-precision signed floating point number, date-time, set, list, properties.

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EXI引入了数据类型，比如二进制、布尔值、小数、浮点数、整数、无符号整数，以及日期-时间。

EXI introduces data types such as Binary, Boolean, Decimal, Float, Integer, Unsigned Integer, and Date-Time.

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