The air intake behind the drivers head ACTS like a 'roll bar'. If the car flips over, it is physically the only thing stopping the weight crushing the driver.

驾驶员头部后面的通风口起着防滚保护杆的作用，用以在赛车翻侧时防止重物撞向车手。

youdao

My older brother ACTS like he hasn't heard anything and continues to play his video game while my oldest brother rolls over, puts his pillow over his head, and continues to count sheep.

我二哥假装没听见，继续玩电子游戏，而我大哥翻翻身，用枕头蒙住头继续睡觉。

youdao

In effect, the store destination ACTS as a "next hop" for messages as they are routed to the central destination, where they are processed by the head office system.

实际上，每个连锁店目的地都作为要路由到中心目的地的消息的“下一个跃点”使用，这些消息将在中心目的地由总部系统进行处理。

youdao

Siouxsie Sioux, Marianne Faithfull and Iggy and the Stooges head a list of acts chosen by Yoko Ono to perform at this year's Meltdown Festival.

BBC: Siouxsie heads Yoko Ono's Meltdown Festival line-up

Producers say 10 acts will go head-to-head each day to reflect musical rivalries or battles to land the number one spot.

BBC: MTV discovers joy of text

Bryan Buchan will head the organisation, which acts as the support group for the engineering industry in Scotland, from 1 January 2013.

BBC: Bryan Buchan named as new CEO at Scottish Engineering