精选优质文档-倾情为你奉上1. protect vt. 保护 protection n. protective adj. protect from保护什么不受伤害2. graduate vt. 毕业 graduation n. graduate from. 从.毕业3. peaceful adj.和平的 peace n.4. pollution n.污染 pollute vt.5. recover vt.恢复 recovery n. recover from.从.中恢复6. common adj.共同的 in common 有共同之处7. pretend vt. 假装 pretend to do.8. convenience n.方便 convenient adj. It is convenient for sb. to do sth. 做某事对某人来说是方便的9