1.______________ n. 环境 2.______________ v.& n. 减少;降低 3.______________ n.保护 4.______________ n.& vt.关心的事 5.______________ vt. 包含;包括 6.______________ n.灭绝;消亡 7.______________ n.事件;事变
incident
environment
decrease
protection
concern
contain
extinction