5.7 � � е � ӹ � � � � � � � � ʼ � � � � � � � � present � � �

5.7.1 � � е � ӹ � ʱ � 䶨 � � � � � �

(� � � �. � � � � � �. � � � � � � � �, gears, gearboxes 1) ʱ � 䶨 � � ĸ � � �

� � argument ʱ � 䶨 � � � � ָ � � һ � � � � � � � � � � � £� � higher � � � � һ � � � � Ʒ � � � � � һ � � � � � � � � � � � � � ĵ � ʱ � 䡣 � � � ǰ � � � � � ҵ � ƻ � � � � � � � � � � � � ɱ � � � ȷ � � � Zhi � � � � � � � � Ա � � � � � Լ � � Biao � � � � � � � � � � � Ҫ � � � ݡ �

(2) ʱ � 䶨 � � � � � �

� � � �. � � � � � �. � � � � � � � �, gears, gearboxes 1) � � � � ʱ � � T� � � � ʱ � � � � ָ ֱ � Ӹ ı � � � � � � � � � the awesome ߴ 硢 � � ״ � � � � � lambda � � � Լ � � � � � ״ ̬ � � � � � � � � ʵ ȹ � � չ � � � � � � � � ĵ � ʱ � 䡣 � � � � � � � � � ӹ � � � ˵ � � � � � � ʱ � � � � � � f � � � � � � � � � � ĵ � ʱ � 䣨 � � � � � � � ߵ � � � � � � � f � ʱ � � � � � ڣ � � �

2 � � � � � � ʱ � � �� � � � ʱ � � � � Ϊ ʵ � ֹ � � չ � � � � � � � � � � � е ĸ � � ָ � � � � � � � � � � � � ĵ � ʱ � 䡣 � � � � � � � � װ ж � � � � � � � � ͣ � � � � � � � � � � � � � ˳ � � � � ߣ � � ı � � � � � � � � � � � � � � seem Ͳ � � � � � � � � � � � � � � ĵ � ʱ � 䡣

� � � � ʱ � � ͸ � � � ʱ � � � � ܺ ͳ � Ϊ � � ҵ ʱ � 䡣 � � � � ֱ � � � � � � � � � � � Ʒ � � � 㲿 � � � � � � � ĵ � ʱ � 䡣

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