您要查找的是不是：
- 用快冻法研究了混凝土在单一破坏因素(single damage factor, SDF)、双重破坏因素(double damage factors, DDF)和多重破坏因素(multiple damage factors,MDF)作用下的冻融寿命。Freezingthawing durability of concretes subjected to single damage factor (SDF), double damage factors (DDF) or multiple damage factors (MDF) was studied by accelerated freezingthawing test.
- 脑缺血后，多种神经营养因子（Neurotrophic factors，NTFs）及神经生长抑制因子（neuron growth inhibitors，NGI）的表达上调，对缺血性神经元损伤修复和再生起着至关重要的作用。The expression of various neurotrophic factors (NTFs)and neuron growth (NGI) increase after cerebral ischemia, which is great important to restore and regenerate injured neurons.
