...medieval monasteries hewn out of the rockface.在岩壁上凿出的中世纪修道院...the rock from which the lower chambers and subterranean passageways have been hewn.开凿出下闸室和地下通道的岩石roughly hewn timber frames粗劈成的木架子the rough-hewn features o...
Minute fragments of shoot apices are proverbially difficult to culture.微小的茎尖切段通常是难以培养的.This concept has now been replaced, for stem apices, by the tunica - corpus theory.此观点目前已经被原套原体学说所取代....