1. A knot of black and white cars obstructed the intersection. 挤作一团的黑白轿车阻塞了那个十字路口。
2. The pillar obstructed our view of the stage. 柱子挡着，我们看不见舞台。
3. First check that the accident victim doesn't have an obstructed airway. 首先要确保事故受伤者的气道通畅。
4. In forests, visual signals can be seen only at short distances, where they are not obstructed by trees. 在森林中，视觉信号只能在没有树木遮挡的地方在短距离内被看到。
5. Congress has obstructed efforts to create a more straightforward visa for agricultural workers that would let foreign workers stay longer in the U.S. and change jobs within the industry. 美国国会一直在为创建更直接的农业工人签证设阻，这种签证可以让外国工人在美国停留更长时间，还能在该行业内更换工作。
