between
between yon and me
意：跟你说句悄悄话;你别跟人家讲;你知道就行了
例.It was what I would call, between you and me, a bribe.
只是跟你说，这就是我称之为“贿路”的那种行为，
.Strictly between the two of us, Sam will be sacked fairly soon.
可别给外人讲啊，山姆很快就会被解雇了。
.Between you and me, I think our boss is really stupid.
只跟你说说，我看咱们老板啊，真蠢!