There they were: signal noise, mutations, executive function, self-organization.
看看这些术语：信号噪声、突变、执行功能、自我组织。
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After hearing the new results, Seth Berkley, chief executive of the International AIDS Vaccine Initiative, said, "Certainly, there's some kind of signal there," but added, "it's a modest effect."
The servo system of azimuth controller is a combine system of mechanics and electrics, the transmission mechanism drives the executive element by control signal to carry out the demanded motion.