Based on the condition for Betz's minimum energy loss, a optimal design code of propeller is developed.

1、

It is known that the coefficient is 0.593 to maximum by Betz Theory.

由贝兹理论可知，该系数最大为0.593。

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2、

She participated in a medical study at the Betz clinic.

她参与了贝兹诊所的一项研究。

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3、

Up to now, the most widely used code tracking performance evaluation theory is presented by Betz.

目前，导航领域应用最广泛的伪码跟踪精度评估理论由Betz创建。

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4、

This is known as the Betz Limit.

这就是众所周知的贝茨极限。

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5、

Methods Between August 1993 and December 2001, BFHR or THR were performed in 48 old patients ( at age of 60-85 years, mean 70.8 years) with subcapital and transcervical types of FNF.

方法1993年8月～2001年12月采用双极股骨头或全髋关节置换手术，治疗老年股骨颈头下型或经颈型骨折48例，年龄60～85岁，平均70.8岁。

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6、

In the 10 patients treated with BFHR, 2 got mild hip pain and limp.

人工股骨头置换组10例，2例出现轻度髋部疼痛和跛行。

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7、

Occurrence rate of hip and thigh pains in the Group THR was3% ( 1/ 29), lower than that in the Group BFHR ( 4/ 16).

全髋置换组髋部和大腿疼痛的发生率为3%（1/29），低于股骨头置换组的发生率（4/16）。

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8、

Nokia does well: the world's biggest handset-maker has already got rid of PVC from its products and will eliminate all BFRs from next year.

诺基亚做得比较好。这个世界上最大的手机制造商在产品中已经不用聚氯乙烯了，并将从明年开始淘汰所有溴化物阻燃剂。

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9、

Brominated flame-retardants ( BFRs) are a new, diverse group of global environmental pollutants.

溴化阻燃剂（Brominated flame-retardants，BFRs）是一类新型的全球性环境污染物。

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10、

Distribution Characteristics and Analysis of Source Fate for OCPs and BFRs in Soil and Atmosphere of Harbin

哈尔滨市土壤与大气中OCPs和BFRs分布特征及源汇分析

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11、

Brominated flame retardants ( BFRs) are widely used industrial chemicals.

溴化阻燃剂（BFRs）是在生产中普遍使用的工业化学制剂，种类繁多。

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12、

The Directive on Restriction of Hazardous Substances ( RoHS) in Europe Union has definitely stipulated to forbid manufacturing some BFRs.

欧盟限制电子电器产品中有害物质的指令（RoHS）明确规定限制某些溴阻燃剂的使用。

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13、

Dell, however, scores well in this regard and on recycling, but loses marks for not having phased out PVC and BFRs yet, though it has set a deadline for doing so.

而戴尔在预防和回收方面得分很高，可是由于没有淘汰聚氯乙烯和溴化阻燃剂而失分很多（尽管戴尔已设定了实现此举的最终期限）。

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14、

With extensive application of fine pitch QFPs and BGAs, precisely and accurately determining and adjusting PCB's temperature profile is necessary to promote solder quality.

目前由于QFP和BGA等器件的大量采用，如何准确地测试、调整印制板温度曲线是提高焊接质量的关键。

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15、

Comparison between Ultra-fine Pitch QFPs and BGAs and their Future

超细间距方形扁平封装与球栅阵列封装的比较及其发展趋势

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16、

Why had they arrested Usman Bhai Jan and not Ataullah?

为什么他们逮捕了乌斯曼大哥而不是阿陶拉？

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17、

He was released after a few days but Usman Bhai Jan was still in army custody as they said they would need him to identify people.

会计几天后就被释放了，但乌斯曼仍在军方的监控之下，军方说他们需要他来指认脸孔。

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18、

By the end of first week, a guy walks up to my cabin and greets me with a' bhai" after my name.

第一周快结束的时候，一个人走进了我的办公室，他叫我名字的时候还在后面加了个“伙计”（巴基斯坦话）。

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19、

I asked Usman Bhai Jan to tell us a joke while we were waiting for two teachers to arrive.

在等候另外两个老师上车前，我要乌斯曼大哥讲笑话给我们听。

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20、

Usman Bhai Jan said no, there was no room; she would have to stay in the back with us.

乌斯曼说不行，因为前面已经没有空间了，她得跟我们一起留在后座。

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