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The frustrating part was this pattern stayed constant for months, even though we were making the product “better” almost every day.

最无法让人忍受的是这种情形居然维持数月之久，前提还是我们每天都在不断“改进”着产品。

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According to the change pattern of some parameters in metal cutting processes, this paper proposes for the first time a new time series analysis model-Autoregressive Constant model ARC (2).

本文根据切削过程中一些参数的变化规律，从理论上首次提出了一种新的时间序列分析模型，即常系数固定价ARC(2)模型。

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Author Cathy Davidson, defines learning as being a constant disruption of an old pattern, a breakthrough that substitutes something new for something old in a cyclical process.

FORBES: Is Personalized Learning another Education Fad or Can it Really Happen in Our Schools?

Certain characteristics of his prose -- hypersensitivity and constant rumination, or persistent contemplation -- reflect a pattern of temperament that some psychology researchers say connects mental illness, especially bipolar disorder and depression, with creativity.

CNN: The story

In 2009, after three years of almost constant hard-drive rotation, all the atoms fell into place in a nice colourful stable pattern on the monitor.

BBC: By Ian Hardy