Living activities of cell require the stimulation of information objects. If one once loses the signal stimulus, cells lack the activities.

细胞生命活动需要信息物质的刺激，一旦失去信号刺激，细胞就缺乏生活力。

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It predicts that the best timing is when the conditioned stimulus, which is the signal, comes before the unconditioned stimulus, which is what you have to prepare for.

它预测，最佳的时机，莫过于作为信号的条件刺激，出现在需要你做准备的，非条件刺激之前。

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The researchers also tested the flies' saliva for enzymes that signal sleepiness and measured the flies' ability to associate a light with an unpleasant stimulus.

研究人员还检测了果蝇唾液中显示困倦程度的酶，还测试了果蝇将光亮与令人不快的刺激联系起来的能力。

youdao

It predicts that the best timing is when the conditioned stimulus, which is the signal, comes before the unconditioned stimulus, which is what you have to prepare for.

它预测，最佳的时机,莫过于作为信号的条件刺激，出现在需要你做准备的，非条件刺激之前。

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Some diplomats said they expected a spirited debate over the wording, which some northern countries regard as a signal to support more debt-fuelled stimulus spending.

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Even though a person may not be consciously aware of movement or of unexpected appearance, the brain detects it and triggers the P-300 brainwave, a brain signal that is thought to be involved in stimulus evaluation or categorization.

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Investors quickly took that as a signal that the Fed stood ready to launch another round of stimulus or quantitative easing (Q3) should economic conditions worsen.

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