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

This is known as the Betz Limit.

这就是众所周知的贝茨极限。

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。

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。

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）。

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。

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。

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

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。

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。

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）。

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。

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

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？

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。

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）。

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。

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。

That day Usman Bhai Jan had had enough and refused to let him.

那天，乌斯曼觉得他受够了，让阿塔尔住手。

Usman Bhai Jan, our driver, made us laugh as usual.

我们的司机乌斯曼大哥跟往常一样，逗得我们欢笑连连。

Judge Bhat presides over a fast-track court set up in the Indian capital to dispose of cases relating to sexual offences against women.

在新德里，法官维伦德尔·巴特主持的这家快速法庭处理了一些有关对妇女的性犯罪案件。