They are visually detached from the external walls, so that the central living space is optically larger, and allows more freedom for internal routes and organisation.

在视觉上，盒子都脱离了外墙，这样中心的起居空间在视觉上就变大了，而且室内的通行路线和空间的组织也更加自由。

youdao

It can be applied to external type 2 and external type 1 routes, but not to intra-area and inter-area routes.

它可应用于外部2型和外部的1型路线，而不是内部地区间和地区航线。

youdao

But most analysts believe existing Russian pipelines still offer both Kazakstan and Azerbaijan the best routes to external markets.

BBC: Oil flows from the Caspian Sea