This second consumer can flood the request queue of the service with a large number of messages in a short time, making it difficult for the call center solution to continue to perform as appropriate.

第二个使用者能在很短的时间内使用大量消息“淹没”服务的请求队列，使得呼叫中心解决方案很难继续正常运行。

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This season, there are candidates on both sides of the ledger, making it a fairly difficult call.

本赛季，以上两类情形中都有合适的人选，要选个最佳教练真是难上加难。

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This is a highly tricky exercise because vortical flow fields act in a complicated (what scientists call nonlinear) manner, making prediction difficult.

这可难了，因为涡流场的变化模式非常复杂(就是科学家所说的非线性变化)，难以预测。

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