obstructions
n. 障碍（obstruction 的复数）；妨碍物
例句
It is my job to make sure that all pathways are clear of obstructions.
保证所有的道路通畅是我的职责。
《牛津词典》
If all the coronary arteries are free of significant obstructions, all parts of the heart will receive equal amounts of oxygen.
如果冠状动脉没有重大堵塞，心脏的各个部位会收到等量的氧气。
《柯林斯英汉双解大词典》
Obstructions of this sort make it all the harder to settle other essential matters swiftly.
类似这样的障碍使迅速解决其它重要事项更加困难。
