山核桃树皮的皮层均由9 - 12层富含营养物质的薄壁细胞组成，其机械性能在一定程度上影响着树皮对溃疡病抗性。
The cortex of bark was consist of 9-12 layer nutrient element parenchyma so its mechanical capability have influence on the resistance to the disease.
最初，他没有意识到他已经开始了一项“不可能完成的任务”因为该学院的工艺美术小组拥有专家，他们精通金属，机械，非地震抗性设计。
Initially, he didn't realize he had set out on a "mission impossible" because the academy of fine arts team had experts in metals, mechanics, and non-seismic resistance design.
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