医生们难以判定她的确切病因。
Doctors found it hard to establish the precise nature of her illness.
其主要风险是技术与市场的难以判定性。
Its main risk is difficult to judge the qualities of the technology and marketing.
情况有点难以判定，一个原因是，和2008年不同，这次竞选开始得晚了一些。
It's a little hard to gauge, I would say, for one reason, " said Rhodes Cook. "It is a late-starting campaign unlike in 2008.
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