只限于咱两之间

Between \Be*tween"\, prep. [OE. bytwene, bitweonen, AS.
betwe['o]nan, betwe['o]num; prefix be- by + a form fr. AS.
tw[=a] two, akin to Goth. tweihnai two apiece. See {Twain},
and cf. {Atween}, {Betwixt}.]
1. In the space which separates; betwixt; as, New York is
between Boston and Philadelphia.

2. Used in expressing motion from one body or place to
another; from one to another of two.

If things should go so between them. --Bacon.

3. Belonging in common to two; shared by both.

Castor and Pollux with only one soul between them.
--Locke.

4. Belonging to, or participated in by, two, and involving
reciprocal action or affecting their mutual relation; as,
opposition between science and religion.

An intestine struggle, open or secret, between
authority and liberty. --Hume.

5. With relation to two, as involved in an act or attribute
of which another is the agent or subject; as, to judge
between or to choose between courses; to distinguish
between you and me; to mediate between nations.

6. In intermediate relation to, in respect to time, quantity,
or degree; as, between nine and ten o'clock.

{Between decks}, the space, or in the space, between the
decks of a vessel.

{Between ourselves}, {Between you and me}, {Between
themselves}, in confidence; with the understanding that the
matter is not to be communicated to others.

Syn: {Between}, {Among}.

Usage: Between etymologically indicates only two; as, a
quarrel between two men or two nations; to be between
two fires, etc. It is however extended to more than
two in expressing a certain relation.

I . . . hope that between public business,
improving studies, and domestic pleasures,
neither melancholy nor caprice will find any
place for entrance. --Johnson.
※ Among implies a mass or collection of
things or persons, and always supposes more than two;
as, the prize money was equally divided among the
ship's crew.