迄今为止，主战场一直是货车运输业。

So far the main battleground has been trucking.

双方近期的主战场是移动计算。

The key battleground in the near term is mobile computing.

春季将会是业务活动的主战场。

Spring will be a period of main battle in professional activities.

太原解放纪念馆：这一带当年曾是解放太原的主战场之一。

Taiyuan Liberation Memorial Hall: This district was once one of main battlefields to liberate Taiyuan.

但是他们的党组织在魁北克这个主战场，多年以来处境不佳。

But their party organisation in Quebec, a key battleground, has been woeful for years.