SummarizationRead each of the following short paragraphs and complete the phrase or sentence that expresses the main idea of the paragraph. The first letter of the missing word is given before the blank.Paragraph4.Programming robots to interpret what their sensors pick up is a tough task. Remember,silicon brains handle information, including sensory data, as zeroes and ones. Imagine the difficulty in try- ing to explain to a robot what a baseball looks like — using only zeroes and ones.4.D_______for robot playing baseball.
【正确答案】：difficulty
【题目解析】：P128
