Other birds flying in the upwash experience reduced drag, and spend less energypropelling themselves.
其他鸟类在上升流中飞行时受到的阻力减小了，它们在推动自身前进时消耗的能量也减少了。
2
That work became an important piece of evidence that dark energy — the mysterious force propelling the acceleration of the universe outward — actually exists.
这项工作成了暗能量（这是推动宇宙向外加速的神秘力量）确实存在的一个重要证据。
3
Increase in demand of polyurethane composites from the transportation, building & construction, electrical & electronics, wind power energy industries propelling the growth of this market.