地表的形态通称为地形，根据海拔高度和相对高度的差异，大致可区分为山地、高原、丘陵、平原、盆地等五大类。
本单元组技师测试，维修和服务于摩托车，小型摩托车，雪地车，叉车和全地形车。
Mechanics in this unit group test, repair and service motorcycles, motor scooters, snowmobiles, forklifts and all-terrain vehicles.
然后将对地形界面的积分剖分为一系列的三角单元积分。
Then, the topography interface integral is decomposed into a series of integrals of triangle elements.
构造一对称拱坝作为对比拱坝，以白鹤滩拱坝为例，采用有限单元法对拱坝的地形不对称因素进行分析。
The factors of topography asymmetry upon the arch dam are analyzed in the essay by finite element based on Baihetan Symmetric Arch Dam.
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