adj.有两形的
The paint is sold in powdered form. 该油漆以粉制品形式出售。
The planes formed up over the airfield. 飞机在机场上空排成队列。
Most synthetic detergents are in the form of powder or liquid. 大多数合成洗涤剂呈粉状或液态。
The ginpole is the simplest form of derrick. 起重吊杆是一种最简单的起重机。