safe shut-down的意思|示意

Because of the low dose oral spray HGF is very safe yet highly effective and there is no danger of causing the pituitary to shut its own growth factor production down.

由于低剂量口服喷雾HGF非常安全，效果又非常好，绝对不会有造成垂体自身生长因子生产下降的的危险。

Seven German nuclear reactors which were officially safe until mid-March have been shut down.

德国有7座在3月中旬之前被官方认为安全的核反应堆已被关闭。