对一个主权国家发动空中打击只不过是active defense（积极防空），或称protective reaction（保护性反应），至多不过是preventive war（防范性战争）。
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After being inoculated, all of the varieties of wheat have "protective reaction" and more enzyme activity whether they are susceptible or not.
接种后，无论抗病品种或感病品种对病原物都有保卫反应，酶活性增强。
A localized protective reaction of tissue to irritation, injury, or infection, characterized by pain, redness, swelling, and sometimes loss of function.
发炎动物组织针对外界刺激、伤害、感染的一种固定保护性发应，表现为疼痛、发红、肿大，有时丧失功能。
CONCLUSION: GLUT1 expression is notably up-regulated in the penumbra region after focal cerebral ischemia, it may be a protective reaction against ischemic injury.
结论：GLUT1在缺血半影区的表达上调，可能是机体对缺血损伤的保护性反应。
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