This article discusses how to make up a test data set so that it is large enough to be useful for testing and has the expected distribution of values and correlation between columns.
Then, for each feed, you import the feed, looping through each of its items to see if any were posted after the last time the user read the feed, as defined by the lastpulled column.
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7. 通过在两脚间轻轻地前后移动你的重心来实验，以便列清楚地感觉重心均匀地分配在两脚的那个点。
Experiment with shifting your weight back and forth slightly between each foot in order to feel more clearly the point where your weight is equally distributed between them.
So even as I worked after graduation in a few unfulfilling jobs here in New York -- I will not list them all -- (laughter) -- even as I went from motley apartment to motley apartment, I reached out.
On a rainy, miserable day, the funeral procession was climbing the steep hill to the cemetery, when suddenly the rear doors of the hearse broke open and the coffin slid out.
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10. 罗格列酮和匹格列酮间无明显差别。
No difference between rosiglitazone and pioglitazone was apparent.
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11. 用傅里叶变换的方法分析了锁模激光器中模式间的相位和振幅涨落对锁模脉冲列特性的影响。
The Fourier transform method has been used to analyze the influence of modal amplitude and phase fluctuations in a mode-locked laser on performance of its output pulse.
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12. 像一列火车的产品是发表在同一时间，而非扫描每一个人纸箱。
Like a train of product that is released at one time instead of scanning each individual carton.
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13. 每天早上你在同一时间同一车站赶同一列火车，而且你总是坐在同一个座位上，读着同一张报纸。
You get on the same train at the same station at the same time every morning, and you always sit in the same seat and read the same newspaper.
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14. 布列松说过：“摄影师像蝴蝶，在一幅幅照片间振翅飞翔”。做一只蝴蝶吧！
HCB once said: "Photographers are like butterflies. They flutter from photo to photo." Be a butterfly.
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15. 通过探索性统计分析，给出了调查报告中各定性变量和出版社间的二向频率列联表。
By exploratory statistic analysis, the paper gave bivariate frequency contingency tables between every qualitative variable and every publishing company.
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16. 中列分内、外两对骨化中心，能转化为顶间骨；
The upper pair of ossific centers may develop into preinterparietal bone.
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17. 这列火车在两座城市间来回开。
The train goes backwards and forwards between the two towns.
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18. 池塘的北面有一个塔影亭，在其临水和柱列间装饰有精致的长窗。
At the north of the pond there is a Tower of water Reflection, decorated with exquisitely-made long Windows at the side facing the water and between columns.
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19. 对各列叶栅的非定常气动力和气动力矩进行频谱分析，探讨叶列间的非定常气动干扰。
Through spectrum analysis of the unsteady aerodynamic forces and moments of each blade cascade, the unsteady aerodynamic interferences between blades were discussed.
Last month some rather more organised criminals lifted 2km of copper wire and cable between Hanover and Hamburg. The line had to be closed for eight hours and 100 trains had to be diverted.
The subgenus Quisquilius Jordan and Evermann, 1 903, with one pair of longitudinal rows of sensory papillae in front of interorbital region, papillae row b elongated, and predorsal scales present.
