4.Yet unless it be thoroughly engrained in the mind, the whole economy of nature, with every fact on distribution, rarity, abundance, extinction, and variation, will be dimly seen or quite misunderstood.
然而,除非它被彻底地牢记在心, 否则整个自然界,以及关于分布、稀有性、丰富性、灭绝和变异的每一个事
, 都将被模糊地看到或被完全误解。机翻