词汇	tier pattern
释义	tier pattern 分层模式
随便看	student characteristic student characteristics Student C: He is indeed a man of super will Student C: He is really the iron man of the sea Student C: How on earth do they chase the pig Student C: How on earth do they chase the pig? student civil right student classification in class Student Client student clubs student coach card student colony student comments teaches student communities student diagnosis student diary Student dining hall student-directed student community student competition student compiler student complaints student comprehensive information student computers student concept