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The kinematic analysis of the planar four-bar linkage and dimensional six-bar linkage can be done by building up the structural equations.

平面四杆机构和空间六杆机构的运动学分析可以通过建立闭链的结构方程来实现。

The transmission mechanism is a plane six-bar mechanism that is made up of two plane four-bar mechanism. Its natural frequencies and mode shapes are obtained by overlapping and synthesizing the mode of each component.

主传动机构是由2个平面四杆机构串联而成的平面六杆机构，通过对各构件的模态进行模态叠加和模态综合，得到传动机构的固有频率和振型。

Based on the model established for circuit analysis of the Stephenson six-bar chains,this paper presents a method of detecting the existence of a crank in Stephenson Ⅱ six-bar linkage.

著名的Grashof准则建立了平面四杆机构的曲柄存在条件，六杆机构虽然可以提

Continuation--Optimization method is proposed for approximate synthesis of linkages The synthesis of planar four-bar and six-bar linkages are studied using this method and several solutions are obtained. Thus, selection of the optimum solution for approximate synthesis of linkages is realized.

提出了机构近似综合的连续---优化法，并应用该方法研究了平面铰链四杆及六杆机构的函数综合，得到了多组机构尺寸方案，实现了机构近似综合的多方案优选。

The conditions for the existence of crank for Watt's mechanism, a basic type of one-degree-of-freedom planar six-bar mechanism,are investigated with the triangular dividing method and the method of instantaneous fixing of the driving bar.

本文采用平面杆机构的三角形划分法及主动杆瞬时凝结法探讨了单自由度平面六杆机构的一种基本型式——Watt型机构的曲柄存在条件；并用取极限的方法得到了其诱导机构的曲柄存在条件。

The Examination of the Sine Bar for the Petroleum Thread Gage;2. The sine bar is a practical precision measuring implement which can measure indirectly or a machining tool for the precision angle by the sine principle.

正弦规是利用正弦函数原理对精密角度进行间接测量或加工的一种常用的精密量具或工具，常用于测量内、外锥体的锥角及外锥体的大小端直径，也用于测量角度块的角度、孔中心线与平面之间的夹角。

In accordance with features of petrology, sedimentary structure, profile structure, electrofacies and seismic facies, underwater distributary channel, frontal sill-like sand, mouth bar, distal bar, front fan-delta mud and mere mud and so on, were identified, and depositional features of them in detail were discussed respectively.

根据羊邑组二段-三段的岩行学、沉积构造、剖面结构、测井相和地震相等特征，进一步识别出水下分流河道、前缘席状砂、河口坝、远砂坝、前扇三角洲泥和浅湖泥等沉积微相，并详述了各微相的沉积特征。

"In the clean and jerk, the lifter takes a shoulder width grip on the Bar and pull s the weight to the front of the shoulders. The lifter then dips down, uses a powerful jumping motion to drive the Bar overhead."

在挺举比赛中，运动员以肩宽的握距抓住杠铃并举至胸前齐肩的地方，然后身体下降，以有力的跳举将杠铃举过头顶。

"In the clean and jerk, the lifter takes a shoulder width grip on the Bar and pulls the weight to the front of the shoulder s. The lifter then dips down, uses a powerful jumping motion to drive the Bar overhead."

在挺举比赛中，运动员以肩宽的握距抓住杠铃并举至胸前齐肩的地方，然后身体下降，以有力的跳举将杠铃举过头顶。

"In the clean and jerk, the lifter takes a shoulder width grip on the Bar and pulls the weight to the front of the shoulders. The lifter then dip s down, uses a powerful jumping motion to drive the Bar overhead."

在挺举比赛中，运动员以肩宽的握距抓住杠铃并举至胸前齐肩的地方，然后身体下降，以有力的跳举将杠铃举过头顶。

Pachomius manual labour was organized as an essential part of the monastic life; and since it is a principle of the monks as distinguished from the mendicants, that the body shall be self-supporting, external work of one sort or another has been an inevitable part of the life ever since.

根据圣pachomius体力劳动组织作为一个重要组成部分寺院生活；以来，这是一个原则的和尚，作为有别于乞丐，该机构应自支撑，对外工作的这种或那种已一个必然的一部分，生活至今。

In order to study the effects of parametrical rolling on the ship movement and tilts, in allusion to ship's navigating in regular following waves, the equation of ship rolling motion is transformed into normal Mathieu equation by proper variable replacement when strong parametrical excitation in restoring moment varied according to sine or cosine wave.

为研究参数横摇对船舶运动和倾覆的影响，通过对船在规则波上随浪航行时，恢复力矩中出现的1个以正余弦规律变化的强参数激励项进行适当的变量置换，将船舶的横摇运动方程转换成标准形式的Mathieu方程。