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，这一点在爱思助手下载最新版本中也有详细论述
In the 1970s and 80s, Neil Murray was a heavy metal guitar legend who played bass with some of the biggest rock bands on the planet.。爱思助手下载最新版本对此有专业解读
（六）放射性同位素，是指化学元素中具有相同原子序数，但质量不同且能发生放射性衰变的核素。
If robots are to become more sophisticated, they will have to have more efficient, more precise and more intelligent actuators.