This hazard is much increased with species that are well disguised and whose natural instinct is to trust to this concealment as their principal defense.
对于伪装得很好的物种,这种危险会大大增加,它们的自然本能就是相信这种隐藏是它们主要的防御手段。
They have a natural instinct to help around the house.
帮着做家务是他们的天生的本能。
Not only is it his natural instinct, but it also helps them cut their teeth.