輸入需要查詢的關鍵字：
詞語：backstair
backstair的同義詞
a. backstairs ，furtive
backstair的解釋
backstair[,bæk'stεə(z)]adj. 間接的
backstair的意思
backstair 間接的;indirect mediate backhanded backstair oblique sidelong 間接的;