adj.全神贯注的；浓缩的；密集的
动词concentrate的过去式和过去分词.
He made a concentrated effort to improve his work. 他全神贯注地努力改进自己的工作。
She diluted the concentrated fruit juice with water. 她搀水冲淡浓缩水果汁。
The presidential palace has been hit again by concentrated artillery fire. 总统府又遭到密集炮火的攻击。
