形容词 stock-still:

1. absolutely still

副词 stock-still:

1. without moving or making a sound

stockn.存货；储备；树干；股票；股份；家畜；血统；汤汁；声望v.采购；储存；供给；发新芽adj.惯用的；存货的stockistn.有库存的批发商或零售商

1. Smoke hung suspended in the still air.
   轻烟在静止的空气里悬浮着。
2. A flying aircraft is a source of disturbance in still air.
   在静止的空气里，飞行器是一个扰动源。