A second line of defense is a risk mitigation strategy, in this case blocking accumulation of the new material in the grain.

第二道防线是风险减轻策略，在这种情况下是阻止作物中新材料的积累。

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And nearly all of their material would, if the time ever came, be useful in our own defense.

他们所有的物资将会用完如果随着时间的到来，而且有利于我们的防卫。

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The material factors including architecture, defense facilities, water conservancy, road, totem pole in the village, graveyard, etc. play an important role in the village building.

佤族聚落的建筑、防御设施、水利、道路、寨桩、墓地等物质要素都发挥着不可或缺的功能。

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"In this day and age, no one should be allowed to possess nuclear-weapons-usable material without providing an armed defense of that material, " said Edwin Lyman, a nuclear physicist with the Union of Concerned Scientists.

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He ruled that the defense could use highly sensitive material in court, forcing the government to accept a compromise of secret information.

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Union Carbide is currently the only domestic supplier of the ultra-high purity semiconductor material increasingly required for defense applications.

CENTERFORSECURITYPOLICY: Center For Security Policy