However, the current system of calibres has been kept.

不过，继续使用了目前的口径区分系统。

It can be integrated into turrets from smaller to higher calibres.

它可以被整合到规模更小口径的炮塔中。

What is clear is that the decisions taken by the US over the next few months will determine NATO small-arms calibres for the foreseeable future.

可以很清楚的事实是美国在未来几个月中做出的选择将决定北约未来小口径武器的口径。