But in the real world when dealing with humans, but even when dealing with animals, we don't actually always use primary reinforcers or negative reinforcers.

但当我们在现实中训练人类，甚至是训练动物时，我们实际上并不总是用到初级强化物,或是负强化物。

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The leading indicators also were up last week with the weak consumer sentiment the primary negative.

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They successfully employed this approach during the primary season, running negative ads around the clock in key states.

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The reading skills that pupils develop by loaning books remains with them throughout their lives and goes some way to counteract the negative effects of an stunted primary education.

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