四角形的

This paper's conclusion includes several points: the contracting process of PSDY is a quadripartite relationship that is more complex than the "third party contracts". Differences in professional decisions and poor collaboration between the departments within the Department of Social Welfare leads to insufficient definition of service, makes effective contract management difficult, provides minimum protection of client accessibility.

透过深度访谈与档案文件分析，本文获得以下几项结论：地方政府少年安置服务的委外，是一个比第三方契约理论所描述的更为复杂的四角关係，公部门內部不同科室之间的成见与隔阂，使得受託者自主空间更大，有效的契约管理更形困难，而个案的服务近用性也更得不到应有的保障。

Inflorescences racemose or spiciform, continuous and dense or less often interrupted and rather lax; corolla tube mostly broadly cylindrical and at least 2 mm wide; branchlets quadrangular and often 4-winged

间断的穗状花序状，连续和紧密的花序总状的或或更少通常和相当疏松；宽多数的花冠筒圆筒状和至少2毫米宽；小枝四角形和经常4有翼 16 Buddleja macrostachya 大序醉鱼草

First modeling, the dumplings are all over the triangle, four cone-shaped, pillow-shaped, Xiaobao pyramid, rod-shaped and so on.

先就造型而言，各地的粽子有三角、四角锥形、枕头形、小宝塔形、圆棒形等。

Based on the instantaneous motion of the moving platforms, the uncertainty configuration conditions and simplified uncertainty configuration equations are obtained for the widely studied parallel manipulators, such as planar 3-DOF parallel manipulator, spherical 3-DOF parallel manipulator, 6-SPS triangular platform parallel manipulator, three-branch 6-DOF parallel manipulator, twotriangular-platform parallel manipulator, DELTA parallel manipulator, 5-DOF parallel manipulator, two-tetragonal-platform parallel manipulator, pentagonal platform parallel manipulator and Stewart platform parallel manipulator.

采用这一方法，根据国内外常用的并联机器人机构的形式，建立了平面3自由度并联机器人、球面3自由度并联机器人、三角平台并联机器人、三支链6自由度并联机器人、双三角平台并联机器人、DELTA并联机器人、5自由度并联机器人、双四角平台并联机器人、五角平台并联机器人和Stewart平台并联机器人的奇异位形条件方程，除了Stewart平台并联机器人外，这些条件方程均为低于6阶的行列式，机器人结构类型不同，其简化程度各不相同。

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。