庆贺: to congratulate, to celebrate...
限定: to restrict to, to limit...
徒弟: apprentice, disciple...
疏通: to unblock, to dredge, to clear the way, to get things flowing, to facilitate, to mediate, to lobby, to explicate (a text)...
匹配: to mate or marry, to match, matching, compatible...
见过: seen; have seen...
聚精会神: to concentrate one's attention (idiom)...
下级: low ranking, low level, underclass, subordinate...
镶: to inlay, to embed, ridge, border...
外部: external part, external...
