四重

With its 56-inch wingspan , a mature female red-tailed hawk can weigh up to four pounds and dive for the kill at 120mph .

一只有56英寸翼展的成年雌红尾鹰，可以重达四磅，为了捕杀可以120英里的时速俯冲。

The Asian elephant is one of 3 living species of elephants and can grow to 4 meters tall and weigh over 5,000 kilos.

亚洲象是世界上仅存的三种象种之一，它可以长到四米高，五吨重。

The result showed that the main damage influence of diseases and worm was thick of ear, grains of row and the weight of one hundred grains, the grade of disease and the amount of worm had significant positive correlation to yield loss; the relationship of diseases and worm was complex, the yield loss of mixed damage was occupied 41.48% of the total damage of the single, the sequence was A＜C＜B＜D＜ABCD＜, the simulated models of mixed damage and economic threshold were developed.

研究表明，病虫为害主要影响穗粗、行粒数和百粒重产量构成因素，病级和虫量与产量损失呈显著正相关；病虫之间存在复合为害关系，复合产量损失率占四者单独造成产量损失率之和的41.48%，其大小依次为：A＜C＜B＜D＜ABCD＜，并组建了复合为害损失及复合经济阈值模型。

In this study, I used kidney bean to rear L. trifolii stock at 24.5 ± 1C, 70 ± 10% R.H., photoperiod 12L : 12D and offered beggar-tick, kidney bean, rape, and tomato as foods for females to test their host preference. The results showed that females exhibited significantly feeding and ovipositional preference on beggar-tick, and larvae ate in kidney bean have highest pupal weight, survivorship and emergence rates.

本研究以菜豆做为维持非洲菊斑潜蝇母族群的寄主植物，在24.5 ± 1C， 70 ± 10% R.H。， 12L ： 12D的环境下，让非洲菊斑潜蝇对大花咸丰草、菜豆、油菜、番茄这四种寄主植物进行产卵及取食偏好性测试，发现雌虫对大花咸丰草存有显著的取食及产卵偏好，而在菜豆上取食的幼虫具有最高的蛹重、存活率及羽化率。

In terms of the fact that Skinned Mesh Animations based on Matrix palette skinning does not work well for non-quasi-articulated objects, this paper presents a new technology for skin deformation, skinning arbitrary deformation,which can set proxy-joints,automatically construct skinning approximations for arbitrary precomputed animations,and use dual quaternion for skinning .

针对利用MPS驱动的骨骼蒙皮动画对于非关节的对象精度不高的问题，提出了基于MPS的任意变蒙皮，该技术在任意动画上设置代理关节，自动为预先处理的任意动画的每一帧构建蒙皮相似量，利用二重四元数蒙皮，实验表明，SAD不仅能够有效地驱动非关节元素对象提高精度，而且能够充分利用MPS的优点

A method for approximate NURBS skinning ;2. In terms of the fact that Skinned Mesh Animations based on Matrix palette skinning does not work well for non-quasi-articulated objects, this paper presents a new technology for skin deformation, skinning arbitrary deformation,which can set proxy-joints,automatically construct skinning approximations for arbitrary precomputed animations,and use dual quaternion for skinning .

针对利用MPS驱动的骨骼蒙皮动画对于非关节的对象精度不高的问题，提出了基于MPS的任意变蒙皮，该技术在任意动画上设置代理关节，自动为预先处理的任意动画的每一帧构建蒙皮相似量，利用二重四元数蒙皮，实验表明，SAD不仅能够有效地驱动非关节元素对象提高精度，而且能够充分利用MPS的优点。

Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution.

对於本套件二进位可执行形式的再散播，必须连带以文件以及／或者其他附*於散播包装中的媒介方式，重制上述之版权宣告、此四条件表列，以及下述*的免责声明。

The heart of this algorithm is to track at least four fiducial points from frame to frame that construct the affine frame, and thus the occlusion contours between virtual and real objects can be reconstructed and reprojected.

算法的核心是在每一帧图像中追踪至少四个基准点，构成仿射基，进而对虚拟物体与真实物体之间的遮挡轮廓进行重建和重投影。

The heart of this algorithm is to track at least four fiducial points from frame to frame that construct the affine frame, thus the occlusion contours between virtual and real objects can be reconstructed and reprojected. Further, each contour is labeled as being "behind" or "in front of" in the first two frames, depending on whether it is in front of or behind the virtual object, so the occlusion is resolved.

该算法的核心是在每一帧图像中追踪至少四个基准点，构成仿射基，进而对虚拟物体与真实物体之间的遮挡轮廓进行重建和重投影，且在前两帧图像中交互指定这些阻挡轮廓相对于虚拟物体的前后位置，从而解决了扩充现实的阻挡问题。

If this ICMP error is received, TCP decreases the segment size and retransmits.

第二十四章，路径MTU发现，如果收到这个ICMP差错，TCP就减少段大小并进行重传。

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。