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Ginkgo biloba extract is the most widely used herbal drug in China and the west countries presently. It comprises multitude components and has numerous pharmacal activities.

银杏叶提取物是目前在中国及欧美国家应用最广泛的植物药，它包含多种成分具有众多的药理活性。

The history and current situation of research in speech recognition are proposed all-sidedly and systematically. We probe into such topics about acoustic features, phonetic features, phonologic features and auditory perception in terms of related theory and disciplines. Furthermore, we summarize and analyze focus in current theoretical and technical aspects of speech recognition and immediately put an insight into challenge to speech recognition presently, even in a long time.

论文全面、系统地介绍了国内外语音识别的发展历史和发展现状，结合相关学科的知识，分析了语音声学特征、语音学特征、音系学特征及其语音感知等有关问题，分析并总结了目前语音识别理论和技术实现方面的研究重点以及目前、甚至在相当长的时期内语音识别面临的挑战。

We suppose that there is a presently undefined subfraction of stem cell population that exists in a number of tissues beyond embryonic development. We term them postembryonic pluripotent stem cells. They differ from embryonic stem cells in that they gradually lose some differentiation potentials during development and adopt some special phenotypes once within a certain tissue. They can give rise to different kinds of stem cells; therefore, help to maintain balance during development and metabolism. They provide cells not only for the damaged tissues they reside, but also for damaged tissues different from them by migration triggered by proinflammatory cytokines or growth factors.

我们认为在胚胎发育后的多种组织中都存在一类原始干细胞群体，它们和造血干细胞、神经干细胞等多能干细胞不同，后者只能分化为特定胚层的细胞，而这类原始干细胞可分化为不同胚层的组织细胞；另一方面，它们区别于胚胎干细胞，在妊娠期间会逐渐失去部分分化潜能，并且会出现一些特殊表型或者分子标志，我们称其为胚胎后亚全能干细胞，这类干细胞具有下列特性：可分化为不同胚层的细胞，分布于身体的所有组织和器官，具有相同的表型或标志；他们在胚胎期存在于一些或全部的组织和器官中，可分化为不同类型的多能干细胞并在生长发育和新陈代谢中维持这些多能干细胞保持平衡；可以参与机体自我修复和更新，不仅能分化为所在器官的组织特异性细胞，参与器官重塑，也可以在炎症因子或者生长因子的趋化作用下，远处转移修复受损组织。

Presently the present is presented to the re presentative.

现在这份礼物已呈现在代表面前。

At the moment to talk with the limited equity participation in matters relating to the concrete, which is presently prestrain equity participation in 500 million in shares.

目前正与该有限交谈具体的参股事宜，目前预参股5亿股。

Presently one of the widely used method of producing VDF is by the pyrogenation of HCFC-142b.

目前工业上广泛采用的生产方法之一是以HCFC—142b为原料热裂解生产VDF。

A brief description of a system of backward Raman scattering presently in use is given.

分析了等离子体中的非线性效应和对光探测系统的基本要求。

The soldiers of Zedekiah had torn down many homes and even palaces within the city so that they might refortify the walls which were presently being assaulted in the enemy siege.

西底家的士兵拆掉城堻\多房屋甚至皇宫，为要增强正被敌人围攻的城墙。

Presently, in our country we mainly apply the manual ultrasonic to detect the locomotive wheelsets. By this way we can predict the remanent life of the wheelset to a degree.

当前，国内提速机车轮对的探伤，主要采用手工超声波探伤的方式，这种方式只能探测轮对的部分区域，而且效率低、误判率较高。

Presently,faced with the serious threat of ecocrisis,we must renewedly and caref...

当前，面临生态危机的严重威胁，我们必须重新审视人与自然的关系，从理论的层面寻找解决生态危机的可实施的良策。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。