This association (which need not be invariable) casts doubt on the optimistic assumption that the positive growth rate of a population is evidence that it has yet to reach its optimum.
2
当然,增长率为正数,可以作为人口在最佳点之下的证据。
Of course, a positive growth rate might be taken as evidence that a population is below its optimum.
3
但我确信,明年经济增长率将为正数,他说。
But I am convinced that next year there will be positive growth, he said.