1. The weather forms the staple of their conversation. 天气构成他们谈话的主要内容。
2. Dwarf sorghum could play a key role in Africa, where it is often a staple. 对于高粱这种非洲人的主食来说，矮茎高粱可能扮演关键角色；
3. Regional economic development is a staple among the applications of economic theory. 地区性经济发展是经济理论应用上的一个主题。
英英解释
n.
1. (usually plural) a necessary commodity for which demand is constant
2. a natural fiber (raw cotton, wool, hemp, flax) that can be twisted to form yarn
3. material suitable for manufacture or use or finishing
4. a short U-shaped wire nail for securing cables
5. paper fastener consisting of a short length of U-shaped wire that can fasten papers together v.
1. secure or fasten with a staple or staples
2. necessary foods or commodities
