Boeing wants to use existing wing and tail control surfaces that shift up and down about 20 degrees in a coordinated fashion to disrupt the vortical flow.

波音公司则利用现成的机翼与机尾控制面，让它们互相协调、上下移动20度，以扰乱涡流。

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Select the control and press the ARROW keys while holding down the SHIFT key to resize the control one pixel at a time.

选择控件，按住Shift键的同时按箭头键，每次将控件的大小调整一个像素。

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Press the down or RIGHT arrow keys while holding down the SHIFT and CTRL keys to resize the control in large increments.

按住shift键和ctrl键的同时按向下箭头键或向右箭头键，以较大增量调整控件大小。

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Barring a miraculous Democratic wave up and down the ballot this November, the axis of power is unlikely to shift enough to hand Obama's party control of a majority of state delegations.

CNN: Electoral College tie possible in Obama-Romney race