Having set the optimum population number for planet earth, the World Planners have also set a date by which to achieve their optimum population number.

为地球设定了最佳人口数目，该世界计划者们还设定了一个在该时间之前实现其最佳人口数目的日期。

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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.

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。

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Of course, a positive growth rate might be taken as evidence that a population is below its optimum.

当然，增长率为正数，可以作为人口在最佳点之下的证据。

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The study by Mr Wire was commissioned by the Optimum Population Trust, a British environmental charity.

ECONOMIST: Fewer people would mean lower greenhouse-gas emissions

The Optimum Population Trust goes further with proposals that government encourage couples to stop at two children and the introduction of a one-in one-out policy on immigration.

BBC: England and Wales population up

Britain's Optimum Population Trust offered summit attendees an opportunity to offset the estimated 1.1 tons of carbon emissions released into the atmosphere from their trans-Atlantic flights by donating money to a family planning program.

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