The prestress of prestressed reinforcement is not constant, but gradually reduces with time growth. This reduction of prestress is called prestress loss.
预应力筋的预加应力并不是常量，而是瞬时或随时间增长而逐渐减小，预应力筋这种预加应力减少的现象称为预应力损失。
I decided a long time ago that my life would be about constant challenge, struggle and growth.
很久以前，我就决定我的生活里必须充满挑战、奋斗和成长。
At the same time, the high-speed growth of Chinese economy and the transfer of international industry lead to constant adjustment and upgrading of industrial structure.
同时，我国经济高速增长和国际产业转移导致产业结构不断调整和升级。
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