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Term 1: Term 2:

(subclass KeyHoldDown KeyboardAction) ComputerInput.kif 1254-1254 KeyHoldDown 是 KeyboardAction 的 subclass
(subclass ShiftKeyHoldDown KeyHoldDown) ComputerInput.kif 1265-1265 ShiftKeyHoldDown 是 KeyHoldDown 的 subclass
(subclass ControlKeyHoldDown KeyHoldDown) ComputerInput.kif 1285-1285 ControlKeyHoldDown 是 KeyHoldDown 的 subclass
(subclass AltKeyHoldDown KeyHoldDown) ComputerInput.kif 1306-1306 AltKeyHoldDown 是 KeyHoldDown 的 subclass
(subclass FunctionKeyHoldDown KeyHoldDown) ComputerInput.kif 1329-1329 FunctionKeyHoldDown 是 KeyHoldDown 的 subclass


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