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。