collapsemode3dmax中的collapse ALL有什么用？

求汽车抗撞性方面的英文翻译，高分，2小时

Through the actual incident investigations, front collision patterns from the collision can contact form, collision speed from two aspects, divided into positive condition declivitous contact form, left, right, left bias tilt tilt right bias, left, right, right inclined offset tilt left bias in 23; etc. Collision speed mainly divided into 10m/h, 15m/h, 22m/h, 25m/h, 30 / h, 35m/h, 40 MB/h seven levels. Currently the collision can realize makers ounted for only the actual incident form of 2%. C6t automotive design

Frontal crash of several typical parameters, such as energy, displacement, velocity and eleration of the relationship between time and etc, and the relationship between them, constitute a frontal impact dynamics model of various. In order to analyze need, still need to add energy density, energy equivalent stiffness, strength, speed, etc. In the stage of conceptual design and project definition, use these parameters for different equivalence collision speed and the collision model with the same intensity) to establish the collision and strength of the damage index corresponding relation, the design parameters of the body structure of control.累死我了````

轮机专业术语“piston ring collapse”什么意思？

piston ring collapse 是指船舶柴油机活塞环毁坏、压扁的意思。

这段话大意思：如果环背面的气体压力建立太慢，从而不能施加一个向外的压力使燃烧气体可以在活塞环和气缸套之间渗透并剧烈地迫使活塞环朝向环槽，最后使船舶柴油机活塞环毁坏、压扁。

大概意思就是：活塞环与气缸套之间的气体压力（即柴油机活塞与气缸套之间气体压力）过低，导致了活塞环不能被很好的压入活塞环的环槽内，所以会毁坏活塞环。

希望我的回答可以帮到你，谢谢！

3dmax中的collapse ALL有什么用？

这个命令是"塌陷堆栈"操作 由于编辑修改器堆栈不仅记录了物体从创建到修改的每一步操作，而且还保留了场景文件的所有编辑操作，因而不久修改器对内存的消耗非常大，塌陷堆栈使减少物体耗费内存的好办法。

塌陷堆栈操作保留每个编辑器对物体作用的效果，将物体缩减成高级的几何体。

但塌陷后的编辑修改器的作用被改变为显式的，不能再进行编辑。

简而言之，模型定了，不再修改的话用这个命令可以把max多占用的内存清掉