NBA规则视图文解析：挤占下落空间防守犯规2例之1-2

守方球员其它犯规 Other fouls by defensive players
守方球员侵占投手下落空间 Defenders undercutting airborne shooters
挤占下落空间防守犯规之一：守方球员挤占攻方球员腾空投篮后的的下落空间构成防守犯规。根据规定，守方球员不能挤占腾空投篮球员下落空间区域。此例中，守方球员右脚侵占了攻方投手腾空跳投后的落地空间，致其倒地。无论故意与否，这种危险动作都构成防守犯规，将被判罚
Defensive player undercuts alighted shooter

Commentary:
This is an example of a defensive foul for undercutting an alighted shooter. Defenders may not move into the landing area of an airborne shooter. On this play, the defender's right foot extends into the shooter's landing area, causing him to roll his left ankle. Whether intentional or not, this is a dangerous play and it will be penalized.
挤占下落空间防守犯规之二：守方球员挤占攻方球员腾空投篮后的的下落空间构成防守犯规。根据规定，守方球员不能挤占腾空投篮球员下落空间区域。此例中，守方球员右脚侵占了攻方投手腾空跳投后的落地空间，致其倒地。无论故意与否，这种危险动作都构成防守犯规，将被判罚（同上 另例）
Defensive player undercuts alighted shooter