Or, if the chemical signal danger, they will flee?

或者, 化学信号是危险, 它们就会逃跑 吗 ?

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Y : You mean like if the chemical signal food, the fish will pursue the food.

你是指,比如说,如果这个化学信号是食物, 鱼就会去捕食.

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This chemical signal is thought to trigger motivation and, eventually with repetition, addiction.

这种化学讯号被认为会触发动机,而且在反复后, 终将会上瘾.

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