?不久

... innn.小旅馆，客栈 by and by不久；以后；后来 ill-treatvt.虐待,不友好地对待 ...

?不久以后

... before long不久以后;很快 by and by不久以后，过一段时间;逐渐地 from now on今后;从现在起 ...

?逐渐

... long不久以后;很快 by and by不久以后,过一段时间;逐渐地 from now on今后;从现在起 ...

?迟早

... by air 通过航空途径；用无线电 by and by 不久；迟早 by chance 偶然，碰巧 ...