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In this paper, the absorption property of the left-handed material rectangular waveguide was studied by use of the perturbation method, and other novel properties were revealed.

采用微扰法研究了左手介质矩形波导的吸收特性。

In this paper,the absorption property of the left-handed material rectangular waveguide was studied by use of the perturbation method,and other novel properties were revealed.

采用微扰法研究了左手介质矩形波导的吸收特性。由于色散方程的限制，左手介质波导不能传输基模，它的吸收特性也与右手介质矩形波导明显不同。

Taking into account the large number of information contained in authoritative journal about the History of Science, while avoiding the unreliability of results concluded by a single journal, through analyzing the contents metrically from 1993 to 2005 in three most authoritative journals on History of Science (ISIS, History of Science , British Journal for the History of Science), the paper displayed detailedly the microcosmic orbits of History of Science, revealed the hot points and hold the trends from the macrocosm and provided evidence and theoretical support for Historiography of Science. This will undoubtedly have an important academic value and theoretical significance.This article has three parts.

考虑到权威期刊所蕴涵的大量的科学史信息，同时避免单一期刊研究结论的不可靠性，本文选取国际上最权威的三份科学史综合期刊《爱西斯》、《科学史》、《英国科学史杂志》(British Journal for the History of Science)，对1993-2005年的内容进行计量分析，详细地展示这十多年来科学史研究的微观发展过程，并在三者计量结果进行相互比较印证的基础上，揭示科学史研究热点及发展脉络，从宏观上把握科学史研究的学术走向，对科学史研究重点的调整提供证明与借鉴，并为科学编史学的研究提供理论支持。

It was a microcassette found in Kathleen Weinstein's shirt pocket that not only led police to her alleged killer but also revealed the New Jersey teacher to be a woman of extraordinary courage and compassion.

正是这个在凯瑟琳。温斯坦衬衣口袋里找到录音带使得警方断定杀人凶手，并且显示了这位新译西州教师作为一个女性的非凡勇气和不同寻常的同情心。

Otolith microstructure and microchemistry studies have revealed various aspects of their early life history that relate to their oceanic larval migration.

耳石微结构和微化学研究已经揭示了影响它们洄游过程中早期生活史的各种影响因素。

Although the thick smear obtained following the administration of DEC did not show any microfilaria at all, the antigen-based ELISA revealed positive finding.

DEC引发试验在患者血液中并未发现有微丝虫，但抗原的ELISA却有较高异常值。

Finally, we observed that the serum TNF-α level decreased gradully in A group after transplantation, and meanwhile the electron micrography revealed that Kupffer cells became from inactivation to disruption and apoptosis.

最后，我们发现A组随着心跳停搏时间的延长，术后血清TNF-α水平不断下降，而同期电镜下可观察到Kupffer细胞从不活跃状态逐渐发展到凋亡和变性、坏死。

Results The patients were predominently female teenagers with a history of gradual onset of bilateral hearing loss, pure tone audiometry revealed symmetric ascending audiograms with moderate hearing loss at frequencies below 1 kHz, but relatively normal hearing at 2 kHz and above. Speech reception thresholds were between 40 to 85 dB HL, discrimination score was from 29% to 68%. Stapedial reflex, auditory brainstem response and compound action potentials were absent or threshold elevated disproportionately to the pure tone threshold. All of the patients had normal cochlear microphonics and robust spontaneously and transiently evoked otoacoustic emissions, the TEOAE showed no contralateral suppression effects as seen in normal subjects.

结果 该病多在青春期后起病，女性较多发，表现为渐进性双耳对称性听力下降，纯音听力以低频损失为主，语言接受阈升高，分辨率下降，镫骨肌反射及ABR引不出或阈值明显升高与纯音听力不成比例，耳蜗微音器电位正常，听神经动作电位引不出，耳声发射波幅高、时程长且不为对侧声刺激所抑制。

The features of cloud microphysics in tropical convections can be revealed well with the contrastive analysis of the simulation.

通过对模拟结果的分析，揭示了热带地区不同海温日变化条件下，对流活动的云物理特征。

Ion microprobe analyses revealed that the zircon from the orthogneiss has high Th/U ratios.

离子探针分析表明，片麻岩中的锆石具有高的Th/U比值。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。