- - -
堂的深处。引申为深奥的义理：蝙蝠夜深出堂奥｜未经钻研，难窥堂奥。
(1) [the innermost recess of a hall]∶厅堂和内室 (2) [the interior of a country]∶腹地 (3) [profundity of thought or knowledge]∶堂的深处,喻含义深奥的意境或事理 无能老蝙蝠,乘夜出堂奥。——张来《夏日杂感》
- -