The world of corporate purchasing can be frustrating for small entrepreneurs who get requests for elaborate formal estimates and bids.

对于小企业家来说，企业采购的世界可能会让他们感到沮丧，因为他们会被要求进行详细的正式评估和投标。

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Although that can indeed be frustrating, this is probably the only way to treat so grand a topic.

尽管这确实令人沮丧，但这可能是处理如此宏大话题的唯一方法。

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Although this can be frustrating and disappointing, it turns out that this can actually be good for you.

尽管这会令人沮丧和失望，但事实证明，这也会对你有益。

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"To see a neighbor that really was a backwater, an underdeveloped authoritarian country now emerge as a model,as a leader, must be very frustrating."

VOA: standard.2010.07.26

When you have more than 100 pounds to lose, dieting can be frustrating and disappointing.

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But when companies ARE hiring and you still hear nothing, it can be frustrating.

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Schuchat acknowledged that it can be frustrating for people searching for this vaccine now.

CNN: CDC: Production of H1N1 flu vaccine lagging