有动力的

All of the aerodynamic force must be produced in the absence of any incident flow, meaning lift can only be produced by the powered reciprocating motion of the wing.

所有的空气动力都必须在缺乏任何迎流的情况下产生，意味着只可能通过翼的有动力作用的往复运动来产生提升。

It is this difference that cased the evolvement of the industrial structure.

自改革开放以来中国经济快速增长，高增长的同时产业结构发生了重大的变动，本文采用结构分解方法利用投入产出表对转型期中国产业发展的动力进行研究，发现最终需求的增长是中国产业发展的最重要动力，同时，不同的最终需求明细项目对各产业有不同的拉动作用，正是这种拉动作用的不同使各产业获得了不同的发展速度并最导致了产业结构的改变。

You had the motivation,a reason to get back at me.

你有动力，有向我报复的理由。

This dissertation's main work and innovations is following: 1. The 6DOF kinematic and dynamic equations of motion for multiple thrusters AUV are derived and presented in a compact form using vector notation. The hydrokinetics of the MTAUV is classified anew. The MTAUV has two kinds of work modes which are cruising and hovering. The fluid dynamical mathematics description of the MTAUV is given anew. 2. The kinetics equations of the MTAUV in the low speed hovering are analyzed and studied.

本文主要的工作和创新点主要有以下几个方面：一、采用矢量参数的形式建立了基于多推进器自主水下航行器的六自由度运动学方程和动力学方程；对基于多推进器自主水下航行器的流体动力进行了重新分类，给出了基于多推进器自主水下航行器在巡航工作模式和悬停工作模式两种不同工作状态下流体动力的数学描述。

There is a distance between our enterprise and foreign enterprise in scale,technology and so on.

技术创新动力不足是长期困扰我国企业的难题，进行如何激发我国企业技术创新动力的研究，是很实际的，也是很有意义的。

The hybrid concepts were introduced by David Taylor Naval Ship Research and Development Center in the USA in 1970s, it combined the three existing sustention source: unpowered static lift , powered static lift and dynamic lift onto a new ship in different proportions.

复合船型的概念最早是由美国大卫·泰勒舰船研究发展中心于70年代提出的，它考虑了水面舰船现有的三种升力源：无动力静升力、有动力静升力和动升力，采用不同的比例进行组合，形成一个全新的船型。

The seasonal variation of the upper layer heat content is controlled jointly by both the dynamic process and the net heat flux from the sea surface, and it can be mainly attributed to the air-sea interaction.

由动力过程和海表净热通量共同控制，2种作用都有明显的季节变化特征，并且随区域的变化两者贡献有所变化；西南季风爆发前，上层海洋热含量最大值的出现，是之前几个月动力作用和海表净热通量共同加热的结果。

This study deals with many branches of modern mechanics, such as structural dynamics, damage mechanics as well as coupling of multi-media and multi-fields. Therefore, the research on structural dynamic properties and underwater acoustic properties of intact and delaminated composite plate structures is not only of great theoretical importance but also of practical value.

舰艇声纳导流罩的动力特性和声特性结构上涉及到复合材料结构动力学、损伤力学以及多介质、多场耦合力系等近代力学分支，因此，健康和分层损伤复合材料层合板结构动力特性和水中声学特性研究的课题，既有重要的理论研究的意义，也具有实际工程价值。

Its friction type clutch working principle is when power transmits the export and input end design on route have is active and driven move two pieces of friction plate, the conduct that passes through the combination of friction plate to control power and cut off.

摩擦式离合器其工作原理是在动力传递路线上的输出和输入端设计有主动和从动两块摩擦盘，通过摩擦盘的结合来控制动力的传导和切断。

And also provide certain theoretical method and reference for continuous research on dynamic design and moving loads identification of the simply supported plate girder bridge.

本文提出的研究方法和成果，将为简支板梁桥的动力分析的进一步研究提供一定的理论依据，也对简支板梁桥的动力设计及移动荷载识别有一定的参考作用。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。