答案:vThe President may sign the bill at any time after its deliverance. If it sits unsigned for more than the 10-day period, it becomes law regardless of his signature or not. The exception to this 10-day period is commonly called a pocket veto. vIn a pocket veto, the President can kill a bill if it goes unsigned and Congress adjourns prior to the 10-day time limit. The term "pocket veto" comes from the fact that if the President knows an adjournment is coming, he can place the bill in his pocket and forget about it.