如果在较低层次遇到阻力，请改为尝试向上层管理人员推荐构建块方法。
If you run into resistance at lower levels, try educating upper-level executives on the building-block approach instead.
的确鸟儿尾巴一样的飞机尾部改善了空气动力学性能，缓解了机体和机翼的阻力，同时还大大的增加了向上的力，缓释了由于飞机本身和货物重量而产生的向下的力。
But it was a birdlike tail that really amped up the aerodynamics, dampening the drag from the body and wings, as well as boosting the lift that lags under vehicle weight and cargo load.
这些趋势在经济向上时比向下时所遇到的阻力要小。
These tendencies will probably work with less friction in the upward than in the downward direction.
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