given a stack of punched cards encoding transactions, they produced a ledger
// 原因：先处理右侧元素，把结果存在栈里，供左侧元素直接使用
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He identified creating a hand as one of the three most difficult problems facing makers of humanoid robotics. The other two were creating an artificial intelligence that allowed the robot to comprehend the world, and making robots in large numbers.
（三）与本案当事人有其他关系，可能影响案件公正处理的。