(笑声)在未来的一百天里，我要学着不再使用提词机，拜登将要学习继续使用提词机。
In the next hundred days, I will learn to go off the prompter and Joe Biden will learn to stay on the prompter. (Laughter.)
本文引入学习机的功能阶数的概念，给出二阶学习机的一种工作模型。
In this paper the concept of ability order of learning machine is introduced and a model of second order learning machine is given.
指令系统是CPU的重要性能指标，掌握指令系统是学习单片机及进行单片机开发设计的基础。
Instruction system is an important performance guideline of CPU, grasping instruction system is the base of learning single chip computer and using single chip computer to develop and design.
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