Meta objects are defined by a directing structure which can be seen as the source of a static field 变形球物体是由静态域的源那样可见的定向结构定义的。
2.
The field can be either positive or negative and hence the field generated by neighbouring directing structures can attract or repel 这个域是正的或者是负的，这决定于生成域的相邻的定向结构之间是互相吸引还是排斥的。
3.
The sound absorption coefficiet of osb was tested by the stationary wave method . the results showed that the osb had good sound absorption property compared with brick and concrete 采用驻波管法测定定向结构刨花板的吸声系数，分析比较了定向结构刨花板与砖、混凝土吸声性能的差异。结果表明，定向结构刨花板具有良好的吸声性能。
