I'll say 'One, two, three, go!' as a signal for you to start.
我喊“一、二、三,开始!”作为你开始的信号。
If something goes wrong—a hungry lizard prowling around for an ant snack, for instance—then a rush of ants returning without food sends waiting reserves a "Don't go out" signal.
如果出了什么问题——比如,一只饥饿的蜥蜴在四处寻找蚂蚁作为零食——那么一群没有食物的蚂蚁就会匆匆归来,给等待的蚂蚁发出“不要出去”的信号。
As a pediatrician, I know fever is a signal that the immune system is working well.
作为一名儿科医师,我知道发烧是身体免疫系统运行良好的一个信号。
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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