端基为氮基的树状大分子对原油不具有降黏效果。
The dendrimers of amino as end group have no visbreaking effect on the crude oil.
在混凝土类软化材料断裂研究中，裂纹端部损伤区被简化为具有黏聚应力分布的非线性裂纹，该黏聚力对裂纹扩展有阻抗作用。
In the fracture study of softening materials, the damage area of crack tip is regarded as a piece of nonlinear crack with cohesive force.
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