Most damage of concrete runway in cold region is not caused by load but by the poor durability of concrete.

寒冷地区机场混凝土道面常常发生非荷载引起的破坏———耐久性破坏，严重影响飞机的安全起降，必须尽快予以解决。

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The invention solves the problems of low damping capability and poor durability of the conventional concrete structure material per se.

本发明解决了现有混凝土结构材料自身阻尼能力低、耐久性差的问题。

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Currently, substitute materials exist many defects, such as thrombus, calcification, and poor durability, most notably is the low level of endothelialization, all of which affect treatment.

目前替代材料存在血栓、钙化、耐久性差等诸多缺陷，最显著缺陷为内皮化程度低，从而影响治疗效果。

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However, these modified celluloses require large amounts of petroleum-based additives such as plasticizers, which results in bioplastics with a low plant component ratio and poor durability, including heat resistance and water resistance.

ENGADGET: NEC builds a better bioplastic from plant stems and cashew nut shells

Even then, however, the unlikely durability of such an assessment made it a poor basis for U.S. disengagement from the world.

CENTERFORSECURITYPOLICY: The Isolationist delusion