danci.911cha.com
原级：obstruct
现在分词：obstructing
过去分词：obstructed
danci.911chaxun.com
过去式：obstructed
1. The plasma obstructs communications between spacecraft and command and control center on the ground.
2. Lee said that disenfranchisement hurts prisoners'dignity and humanity, which obstructs their rehabilitation upon release.
3. Chinese like taking photos as souvenirs when visiting a new place, but this habit obstructs others if they don't shoot one by one.