The bulk of the Ruby class Calc USES Ruby's metaprogramming features to define functions at run time for all the digit keys and for the math operation keys.
大多数Ruby类Calc使用Ruby的元编程功能，在运行时为所有数字键和数学操作键定义功能。
The bulk of the Ruby class Calc USES Ruby's metaprogramming features to define functions at run time for all the digit keys and for the math operation keys.
大多数Ruby类Calc使用Ruby的元编程功能，在运行时为所有数字键和数学操作键定义功能。
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