查询词典 been

In Chapter 2, by means of the integral theory, a number of reciprocal series involving binomial coefficients have been established and some results related to binomial coefficients have been extended.

本章利用定积分的方法和常见的发生函数，结合一些运算技巧，建立了一些与二项式系数的倒数有关的恒等式。

With its unique molecular structure and outstanding bio-activities, qinghaosu has been proven as a worthy subject for in-depth studies with profound influence, not only for pharmacy, but also for phytochemistry, biogenetic synthesis and organic synthetic chemistry, chemical biology, etc. A great amount of work has been done in the last 30 years, with a lot more issues to be explored. Researchers need to seize the opportunity and make more achievements.

青蒿素以其独特的分子结构和杰出的生物活性显示出它是一有深远影响的研究对象，不仅对于药学，而且对于植物化学、生源合成、有机合成化学、化学生物学等学科都是一个可以大有作为的课题。30年来国内外已做了不少工作，但是还有更多的问题有待探索，机不可失，时不再来，期待着在綻放青蒿素的故土上结出更多的果实。

At the same time, some research fields both in theory and application of remote-sensing biogeochemistry have also been emphasized, and the fast and effective methods of prospecting for deposits have been explored in the vast vegetation regions.

同时，指出了需加强该领域的理论和应用研究，为广大植被覆盖地区寻求一种快速有效的探矿方法。

The three–dimension virtual model of biped robot has been developed with the Adams software and control system has been designed with Matlab software.

在Adams软件中建立机器人的三维虚拟样机模型，在Matlab软件中设计控制器，进行联合仿真。

"An individual, ma'ma," said Bitzer,has never been what he ought to have been, since he first came into the place.

"某人，夫人，"毕周说，从他第一天到这个地方来，就不象个样子。

5"An in dividual, ma'ma," said Bitzer,has never been what he ought to have been, s in ce he first came in to the place .

"某人，夫人，"毕周说，从他第一天到这个地方来，就不象个样子。

Then a bivariate Weibull distribution model, non-fatal shock mixture model, has been established to determine the reliability life distribution of the complex system with dependent components. And a synthetical approach has been suggested to estimate the parameters of the distribution model.

在总结分析复杂设备特点及其维修方式的基础上，从可靠性、维修性、监测性和经济性角度分析了影响维修决策的因素，建立了复杂设备各重要功能单元重要度评估指标体系，为维修方式决策提供了可靠依据。

The motive behind this is unclear, though it has been theorised that they wished to pillage our world for its natural resources. Race X's invasion was a campaign of opportunity, and there have been no instances of Race X activity on Earth since the destruction of Black Mesa, presumably because after the nuclear blast the Black Mesa area was an inhospitable environment, and the Earth as a whole lost its appeal as a target once it was conqured by the Combine.

虽然以推断出它们希望掠夺这个世界的自然资源，但是在此背后的动机是为了核能。X族的入侵是一个战役机会，而且在黑山基地毁灭前并没有X族在地球活动的先例，可能是因为在核爆炸以后，黑山地区变成了不适合居住的环境，作为曾被联合军征服过的目标，地球已完全失去了自身的吸引力。

The technique of the expert system and neural network has been widely applied to some blast furnace in Japan, which has been in the beginning in china.

专家系统及神经网络技术在日本的一些高炉上已经得到了广泛的应用，而在我国还刚刚起步。

I\'ve been staying up late and my eyes have been bleary.

我熬夜熬得眼睛模糊了。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。