A radiologist inserts the needle manually while the robotic arm keeps it aligned.

放射线研究员会将活检针手动插入，与此同时，机械臂会保持对准。

In fact, goats always keep their pupils aligned with the horizon, rotating their eyeballs in their sockets as they move their heads up and down.

事实上，山羊总是让它们的瞳孔与地平线保持一致，当它们上下移动头部时，它们的眼球在眼窝里转动。