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(chǎn)量都無(wú)法與一年生谷類(lèi)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(shí)上，谷類(lèi)作物并沒(méi)有引起我們對自由主義市場(chǎng)的關(guān)注，也沒(méi)有減少?lài)H市場(chǎng)的支配，合作和控制作用。
