Objective: To study the diagnostic role of broadband ultrasonic attenuation ( BUA) in measurement of bone mineral density. Determination of Fatty Liver Ultrasonic Attenuation

Methods 60 elderly healthy men were divided into three groups, 20 with normal bone density ( Group A), 20 with osteopenia ( Group B) and 20 with osteoporosis ( Group C), according to broadband ultrasound attenuation ( BUA).

方法60例健康老年男性按照宽波段超声衰减（BUA）值分成骨量正常组（A组）、骨量减少组（B组）和骨质疏松组（C组）。

Cloning of bromoxynil-specific nitrilase gene ( bxn) from Klebsiella ozaenae and expression in prokaryotic cells

臭鼻杆菌腈水解酶基因（bxn）的克隆及其在原核生物中的表达

A goalie in full gear outweighs a puck bya factor of about 600. Even the fastest slap shot has less momentum than aten-year-old skating along at a mile per hour.

一个穿戴全副装备的守门员的重量是冰球的600倍左右，即便是以最快速度击出的冰球的动量也不超过一个10岁小孩儿以每小时1.6千米的速度滑冰时的动量。

The Polarization and Population difference of the three-level atom, driven bya microwave field and interacted by a strong short laser pulse, is studied by me-ans of semiclassical theory in the paper.

本文采用半经典理论方法研究了在短脉冲作用下，被共振微波场驱动的三能级原子极化强度振幅和粒子数差随时间的变化。

The method of2nd-order optimal design of deformation monitoring network is illustrated bya numerical example.

最后通过一个算例说明形变监测网二类优化设计的方法。

Total cholinesterase ( TchE) activity in103 amniotic fluid samples were assayed bya modified serum cholinesterase assay meth-od.

作者采用改良血清胆碱酯酶测定的方法测定了103例羊水标本中的总胆碱酯酶的活性。

In the investigation in to the suspect, thr policeman was ran over bya car.

在调查嫌疑犯的时候，那个警察被一辆汽车撞倒了。

Currently, Lutari Island is being pummeled bya huge storm, making it even more inaccessible.

目前，鲁塔利岛正惨遭非比寻常的风暴袭击，让它更难以接近。

The interaction of a single mode laser field with N two-level atoms is described bya Hamiltonian trilinear in the boson operators.

本文用玻色算符的三维型哈密顿量描述单模激光场与N个两能级原子的相互作用。

I agonize over every column ， precisely' cause I know it is gonna be read bya lot of people, and it's gonna be in Google, you know, forever.

我撰写每篇专栏都深陷痛苦，就是因为我知道有很多人会看，而且这些文章会永远摆在谷歌上。

The medial wall of thetendon sheath is longer than that ofthe lateral one and is strengthened bya synovial fold above the lesser tuberosity.

小结节上方有一滑膜皱襞加强内侧壁。腱鞘的内侧壁长于外侧壁。讨论了其功能和临床意义。

The primary blast injury of a living body occurs as a direct effect of changes in ambient pressure caused bya blast wave.

原发冲击伤是爆炸产生的冲击波直接作用于生物体而引起的。

Experimental results have shown that a digital phase-shift trigger circuit controlled directly bya microcomputer is wide-ranged in phase-shift, and is simple, reliable and convenient.

实验证明由微机数据总线直接控制的全数字化移相触发电路，具有移相范围宽、线路简单、控制方便、运行可靠等优点。

British police chiefs studied the annual report of bulldog-jawed Lord Byng of Vimy, commissioner of Metropolitan Police of London.

英国警察局长研究了斗牛犬下巴主宾的维米，伦敦都市警察专员年度报告。

After several lazy months at home, I was sent to Eton, one of the most famous English bys' schools. There, I soon forgot William Wilson and the strange fears I had felt.

在家里游手好闲地待了几个月后，我被送进了伊顿公学，英国最负盛名的男校之一。到了那里，我不久便将威廉·威尔逊和我曾感受到的恐惧忘掉了。

Methods: Expressions of PgP and ER/ pR in 120 cases of breast carcinomas were detected byS-P Immunohistochemistry.

方法：采用S－P免疫织化方法，对120倒乳腺癌组织进行P糖蛋白（PgP），ER／PR表达的检测。

The bys are starting school on Monday.

男孩儿们星期一就要开学了。

My classmate Li Qiang and I go to school by bys every day.

我和同学力强每天乘公共汽车上学。

The curd of broccoli was constituted bys horten, succulent main scape and several branch curds, the branch curd was contained by many lateral scapes and flower buds.

花球是由短缩、肉质的主花茎与一定数目的分球构成的，而每个分球则由短缩、肉质的第1级侧花茎及其上各级的侧花茎和花蕾组成。

For BVR attacking, different shoot Methods: Would have influence to the catch probability of anti-ship missile.

超视距攻击下, 不同的射击方式对捕捉概率可能产生不同的影响.