这个问题在序言中已粗略地提到了: the subject has been referred to cursorily in the preface
特别: 1.(与众不同) special; unusual; particular; out of the ordinary 短语和例子没什么特别的地方 nothing out of ordinary; 他的口音很特别。 he has a peculiar accent.2.(格外) especially; particularly; specially 短语和例子质量特别好 be
