这种连系（无须是一成不变的）令人对所谓正数增长率表示人口还没有达致最佳点的乐观假定感到怀疑。

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.

youdao

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.

youdao

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.

youdao