The influences of nonuniform vertical flow on helicopter trim controls and regressive lag modal damping levels were analyzed in hovering and forward flight.

分析了直升机从悬停到小速度前飞时，定常垂直气流的非均匀分布对直升机平衡操纵以及对系统摆振后退型模态阻尼的影响。

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Mr Obama seems to be hoping that his Republican opponents, many of whom have put forward proposals for regressive flat taxes, for example, will take their coddling of the rich too far for most voters' tastes.

ECONOMIST: Barack Obama offers America a new square deal