After light stimulation, negative waves were recorded from each electrode.

经光刺激后，负波被每个电极记录下来。

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Remember when we have waves we can have positive or a negative amplitude.

记住一个波会有,正的幅值和负的幅值。

麻省理工公开课 - 化学原理课程节选

The continuing waves of negative economic reports in May, June, July and now into August have had economists scrambling to revise their growth forecasts downward, but they have not been quick enough to keep up with the pace of the downbeat reports.

FORBES: Economists Are Behind The Curve Of Economic Reality