1. The pattern involves initially a constriction of the arteries that feed the brain. 这一变化首先涉及给大脑供血的动脉血管的收缩。
2. A large boa(Constrictor constrictor) of tropical America that has brown markings and kills its prey by constriction. 一种大蟒（巨蟒蟒蛇属），生活在美洲热带地区，有褐色斑纹，用身体缠杀动物。
3. However, because of the influence and constriction of many factors, it becomes one of the most difficult tasks to consummate education. 然而，使教育完善，由于要受到多种因素的影响和制约又使它成为一项最艰难的工作。
英英解释
n.
1. a narrowing that reduces the flow through a channel
2. tight or narrow compression
3. a tight feeling in some part of the body
4. the action or process of compressing
