没有甚至一个线索
Not even a clue
以上为机器翻译结果，长、整句建议使用 人工翻译 。
一旦它在那里，他们很难保持他们在商店里，因为他们实在没有一个线索，将如何做，他们甚至很难相信他们的市场研究数据。
Once it was out there, they had a hard time keeping them in stores since they really didn't have a clue how well it would do and they had a hard time even believing their market research figures.
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