运用NDFEPS - 2d计算了若干场地模型的地面加速度反应谱、速度反应谱、位移反应谱。
The ground surface response spectrum of acceleration, velocity and displacement were calculated using NDFEPS-2D.
从这样的分层和组合性可以知道，在模型的任何层之间，都可能从场地内服务或功能供应转换到服务和功能外包。
Layering and compositionality imply that the transition from providing some service or function in-house to sourcing the service or function can take place between any of the model's layers.
自由飞模型一般都很袖珍，容易储存，也容易在小场地飞行而不会打扰邻居。
Free flight scale models tend to be a handy size - easy to store at home, and capable of flying on small fields without disturbing the neighbours.
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