grain crop的用法和樣例：
例句
- Although perennial crops, such as alfalfa and sugarcane, already exist around the world, none has seed yields comparable to those of annual grain crops.
雖然世界各地已有一些多年生作物，像是苜蓿和甘蔗等，但它們的種子產量都無法與一年生穀類作物相比。 - In fact, the grain does address some of the concern between market liberalisation and called to reduce the dominance of international markets and the corporations controlling them.
事實上，穀類作物並沒有引起我們對自由主義市場的關注，也沒有減少國際市場的支配，合作和控制作用。
