To get the ball under the bar, they must learn to aim slightly lower than normal, reducing the ball's take-offAngle by around half a degree.
为了让球在门柱下，他们必须学着瞄准得比往常烧低一些，将球的起飞角度降低半度左右。
2
It concludes that lower absolute speed, smaller take-offAngle and poorer take-off ability are the main factors which lower the athletes 'performance.
分析认为绝对速度较慢、起跳角较小、起跳能力较差是制约我国运动员成绩提高的主要因素。
3
Therefore, athletes should be a smooth run-up in the game, off to a strong and decisive, take-offangle should be appropriate and have a certain altitude;