Liffe robusta coffee futures contract , one of the world 's benchmark coffee prices .

罗布斯塔咖啡价格是全球咖啡基准价格之一。

In turn , demand for lower-quality robusta beans , which have a bitter taste , has increased .

因此，市场对质量较低味道较苦的罗布斯塔咖啡豆的需求有所增加。