They are bilateral symmetrical animals with a triploblastic body plan. 它们是三胚层体制的两侧对称。
On this basis, a kind of symmetry bevel automatic welding equipment with vertical and horizontal tracking system is designed, which has met the production requirement well. 在此基础上设计并研制了具有高度和横向跟踪的两侧对称斜角自动焊设备,较好地满足了生产需求。
The graph is divided by its symmetry axis. 这个图形沿着对称轴左右对称。
Bilateral symmetry, for example, is almost universal among animals. 举例来说左右对称就几乎普遍地存在动物世界。