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the flow entering the thermal exchanger appears cyclical variation since the engine of gas-heating pumps discharges the exhaust gasses discontinuously. so, using the traditional stable state method to design and simulate the thermal exchanger will produce big error.

天然气热泵发动机汽缸工作排烟气的不连续性，使进入换热器流量呈现周期性变化，因此，将传统的稳态方法用于发动机烟气换热器的设计与模拟会产生较大的误差。

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results the cyclical variation of the sao 2 is associated with that of the respiratory flow, and there is essential coherence between the cyclical variation of the pulse rate and that of respiratory flow in the most patients.

结果患者SaO2的周期性变化与其呼吸气流的周期性变化是一致的。大部分患者脉率变化周期与呼吸气流变化周期基本一致。

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the process quality of semiconductor manufacturing is influenced by variant factors, such as positional variation, cyclical variation and temporal variation. a new process quality analysis method based on multi-vari analysis is presented.

针对半导体晶圆生产中存在着位置间变异、晶圆间变异及批次间变异，提出了基于多变异分析（MVA）的工序质量分析方法。

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meanwhile, there were significant differences in abundance percentage of different body length in gammarus community and corophium community, and some cyclical variation was showed.

同时，钩虾和蜾蠃蜚群落不同体长个体的丰度百分比差异明显，表现出一定的周期性变化规律。

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in recent 47 years, the seasonal and annual number of precipitation days in hubei province reflected the cyclical variation during four years.

近47年湖北省四季及年降水日数的年际变化均呈现出了4年左右的变化周期。

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these two measures of cyclical variation, percent of trend and relative cyclical residual, are percentages of the trend.

度量周期波动的两个量&趋势百分数和相关周期余数，都以趋势值的百分比表示。

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research the cyclical variation seasonality of logistics demand forecasting

研究结果表明：I.物流需求预测中周期因素和季节因素的探讨

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characteristics of cyclical variation for four-stroke small utility gasoline engine

小型通用四冲程汽油机循环波动特性研究

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NO02, Body lotions are good for moisturizing in hot weather.

身体乳在热天对于滋润肌肤很有帮助。

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Japanese Cherry Blossom Body Puree

樱花身体乳

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This skin-firming lotion contains coenzyme Q10 and cocoa butter.

这身体乳包含辅酶Q10和可可脂。

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especially with refactoring, when the objective is, in a sense, to stay in the same place, it is always possible to break the journey down into steps small enough to validate.

在重构过程中，当目标总是停滞不前，我们总是可是把事情分成一小段一小段的，以便查验。

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Autoresponder Memberships (people pay for email; watch this free video)

自动应答会员（为邮件支付；观看免费视频）

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What remains to be seen is whether the charges stimulate revenue or inspire users to seek free content elsewhere.

收费节目是否能增加收入呢？还是会让用户从其它地方寻找免费视频呢？

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If you and your family and friends or business relationship between the families are using webcams, you can also make free video calls.

如果您和您的至亲好友或生意上的关系户都用网络摄像头，您还可以进行免费视频通话。

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Mr Khan thinks that some viewers will want to own content, and that may become a premium option on free services such as Hulu.

韩先生认为，某些观众仍然会希望保存某些节目内容，这也许会为Hulu这样的免费视频供应商提供一些额外的收入。

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Yahoo, AOL and MSN each has tens of millions of regular users and is adding a voice service and, in some cases, free video conferencing.

雅虎、美国在线和MSN各自都有数以千万计的固定用户，并在增加语音服务，某些情况下，还增加免费视频电话服务。

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This represents a bigger problem on this device than on the iPhone, where many sites automatically serve up mobile, Flash-free versions.

因为许多网站都自动提供可移动性和提供免费视频，所以这个缺点在iPad上表现得比iPhone还要明显。

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Hulu, a free video website that was launched in America in 2008, said this week that it would begin selling subscriptions.

于2008年在美国成立的免费视频网站Hulu这星期也称其有可能开始收费订阅服务。

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Free videos from other schools are available at the Apple iTunes store.

在苹果iTunes商店中有其他学校的免费视频。

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