One worry is that once interest rates fall too far, it will be hard to lift them again.

一个担心是一旦利率降的过多，再提高就很难了。

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The lift then began to fall faster and faster until someone hit the emergency stop button.

随后电梯开始向下坠，越来越快，直到有人压下紧急制动按纽。

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When both are raised, overall lift fall and drag increases, so the aircraft descends.

当两边的扰流片都扬起时，升力就会下降，阻力增加，飞机下降。

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Newcastle Crown Court heard the fall happened when the lift was disconnected awaiting spare parts.

BBC: Heathdale Rest Home in Whitley Bay

August and September are historically the worst months for airlines, but the fall usually provides a lift.

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The pilot must then change the pitch of his craft to let it enter a mode called autorotation, in which the rush of air as it descends keeps the blades whirling, thus providing lift that slows the fall.

ECONOMIST: Monitor