在试验过程中实现对库水位循环升降的控制，模拟库区边坡在水位升降作用下的失稳过程。
Controlling of drawdown and charging of reservoir is implemented in the test, which makes it possible to simulate the whole process of instability of the slopes.
只有当船体从升降架上自由悬挂，脱离海床和周围泥浆的吸力作用时，打捞工作才进入第二阶段。
It was only when the hull was hanging freely from the lifting frame, clear of the seabed and the suction effect of the surrounding mud, that the salvage operation progressed to the second stage.
对于托尔伯特而言，在一般时间内电梯都是不起作用的，公车的升降机坏了或是司机们根本不知道如何应对残疾人。
According to Talbot, the elevators didn't work half the time, bus lifts were broken and drivers were not educated in dealing with the disabled.
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