以下是引用pharmacystar在2008-3-26 19:02:00的发言:Some species of Arctic birds are threatened by recent sharp increases in the population of snow geese, which breed in the Arctic and are displacing birds of less vigorous species. Although snow geese are a popular quarry for hunters in the southern regions where they winter, the hunting season ends if and when hunting has reduced the population by five percent, according to official estimates. Clearly, dropping this restriction would allow the other species to recover. 逻辑链条 recent sharp increase导致了 some species are threaten 所以为了 allow species 复苏 必须 减少 recent sharp increase 也就是找出recent sharp increase的原因 原文认为 restriction是引起 recent sharp increase的原因 那么我们只要证明restriction不是引起recent sharp increase的原因 B刚好证明了这点 这才是真正的逻辑链
逻辑链条 recent sharp increase导致了 some species are threaten 所以为了 allow species 复苏 必须 减少 recent sharp increase 也就是找出recent sharp increase的原因 原文认为 restriction是引起 recent sharp increase的原因 那么我们只要证明restriction不是引起recent sharp increase的原因 B刚好证明了这点 这才是真正的逻辑链 逻辑链条 recent sharp increase导致了 some species are threaten 所以为了 allow species 复苏 必须 减少 recent sharp increase 也就是找出recent sharp increase的原因 原文认为 restriction是引起 recent sharp increase的原因 那么我们只要证明restriction不是引起recent sharp increase的原因 B刚好证明了这点 这才是真正的逻辑链 个人认为说的很明了。 |