It's current purpose is as a secondary support unit.

它目前的角色是次级的支援单位。

youdao

The secondary support structure and the enclosing of the lining must be established in time to improve the performance of the lining.

④对于浅埋大断面大跨度连拱隧道，应及早施作二衬，封闭成环，以改善结构受力。

youdao

However, those who get social-support from secondary support system spend more time on play game, design and maintain homepage, and blog.

而后者较花时间在打电玩及设计或维护网页、网站上；

youdao

Those funds help to support primary and secondary education in Kenya.

VOA: standard.2010.03.04

The human race was meant to propagate, and the definition of marriage was meant to support that objective, with secondary benefits being the love and support of the partners.

FORBES: Most Read on

He developed a strategy that made clear that our number-one priority, the reason why we are in Afghanistan, is because of al Qaeda, and that our number-one objective for our mission in Afghanistan is to disrupt, dismantle, and ultimately defeat al Qaeda, and that all other objectives that are secondary to that help support the primary objective.

WHITEHOUSE: Press Briefing

In fact, many high schools (secondary schools) around the US support a traditional foreign exchange student club and national organization, the American Field Service (AFS), founded by WWI ambulance drivers like Mr. Patch.

BBC: Have your say: Harry Patch