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1·Reactive aggression is only desirable if it is based on the fighting aspect with little or no trace of flight instinct being present.

防御性只有建立于战斗本能，而非逃跑本能时，才是可取的。

2·However, reactive aggression must be delicately balanced in the dog's temperament because it is comprised greatly of both fight and flight instincts.

然而，在犬的禀性中，防御性必须取得微妙的平衡。防御性与战-逃本能相关。