But Rene's battle with cancer cast doubt over whether the couple would have more children of their own.
但是由于丈夫身患癌症，两个人能否拥有更多孩子还是个问题。
Perhaps more threatening than the rockets themselves was the doubt they cast over Israel's vaunted power of deterrence, which is key to keeping its hostile neighbors at bay.
或许比火箭弹更具有威胁的是哈马斯对以色列自诩的震慑力的怀疑，这种震慑力是牵制其敌对邻国的关键。
For much of the past four decades, economists have puzzled over a paradox that cast doubt on GDP as the world's main indicator of success.
过去四十年大多数时间，经济学家一直对一个悖论迷惑不解，这个悖论使人对GDP作为全球国家成功主要指标的角色产生了质疑。
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