推导出了中等稳定顶板条件下计算支护系统所需阻力和可缩量的公式，并进行了相应的模拟实验研究。
The formula of calculation of support system resistance and yieldability under condition of medium stable roof is derived and proved through eguivalent model testing.
在系统绝对能控的条件下，给出了具有稳定滑动模态的切换泛函的设计方法。
The design method for the switching functional which leads to stable sliding modes is presented if the system is absolutely controllable.
工人们在炎热、恶劣的条件下长时间辛苦工作，以稳定被自然灾害破坏了冷却系统的核电站。
Workers have toiled under hot and harsh conditions to stabilize the plant since the cooling systems were destroyed by the natural disasters.
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