That seems once obama come to the office, the trends of the usa economy will bend up suddenly. 似乎有一天奥巴马到了椭圆形办公室,美国经济的形式会突然变好。
When one row on one side blows air at a higher pressure than the other it causes the airflow over the trailing edge on that side to bend up or down, in exactly the way that an aileron would, and the plane rolls accordingly. 当一侧机翼上的一排狭槽喷出的空气压力大于另一排,就导致了掠过机翼后缘的气流偏向上方或偏向下方,与副翼的作用完全相同,飞机随之上升或下降。
If the amount of positive and negative charges is varied, the electron stream can be made to bend up or down in varying amounts. 如果正负电荷的量发生变化,电子流上下弯曲的程度也随之变化。
This allows the knees to bend freely up and down. 这样能使膝盖自由的上下弯曲。
But sometimes when I bend downto pick up the morning paper. 但有时当我弯腰(BU)拿早报时。