But whether the move was really necessary is questionable.(但是动用石油储备是否真的必要仍然受到质疑。)
It is questionable whether this is a good way of solving the problem.(这未必是一个解决问题的好办法。)
Gold's performance in the longer term is questionable.(从长远来看，黄金的表现是有问题的。)
Even the value of much scientific data is questionable.(即便是一些具有价值的科学数据也是可质疑的。)
He has been dogged by allegations of questionable business practices.(他一直被有可疑商业行为的传言困扰着。)
But their success is questionable.(但能否成功还是未知数。)
It is a questionable decision.(这是一个令人质疑的决定。)
Sometimes original art works appear questionable or inauthentic because they've had so many restorers add touch-up layers to cover up damage, damage from the paint having deteriorated over time.(有时候艺术品真迹看起来是赝品，是因为很多修护人员添加了很多层保护膜，以覆盖油画上的损伤；而随着时间的推移，画作上损坏的地方已经恶化了。)
But at times Obama's use of "unprecedented" is questionable.(但是有时候奥巴马对“空前”的使用就值得推敲。)
Only the title Housewife, looked questionable.(只有那个“家庭主妇”，看起来是个问题。)
