大多数禾本科胚有一片瓣状结构通常称为外胚叶。
Most grass embryos have a flap-like structure known as the epiblast.
以结晶器出口处铸坯形状为判定依据，六瓣状结构明显优于两瓣、三瓣和四瓣结构。
The simulation results show that the models with different petals influence on the shape of billets in the mould exit obviously.
结果应用上述方法比较成功的建立了手指解剖结构及指固有动脉逆行岛状瓣的三维模型。
Results: 3d model of finger's structure and digital artery island flap are produced Successfully. This model can rotate freely on the computer screen.
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