米拉及其合作者指出，这些早期模型确实有些严重的局限性。
Mira and co point out that these early models had some serious limitations.
但是米拉极其合作者指出，那些早期模型确实有些严重的限制。
But Mira and co point out that these early models had some serious limitations.
拉纳·米特指出环境可能是一个争拗点.他说:「这是一个能够团结中产阶级的议题之一.首先当你们一旦得到一定水平的富足,便加强对环境的关注.第二,因为有一个拥有财富的中产阶级,他们变得更加关心自身利益.任何稍为偏颇的方向都可能带来麻烦,也许是一个提示.」
"It is one of those issues which can articulate the middle class, " he said. "Firstly because once you've got a certain level of prosperity, concern about the environment becomes greater.
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