However, as the main member of the market, the futures broker companies are still facing the following problem: single-crop farming and simple way of profit-making.
但作为期货市场的主要主体的期货经纪公司仍存在着业务模式单一、赢利方式简单的问题。
2
To take an extreme example, farmlands dominated by a singlecrop are so unstable that one year of bad weather or the invasion of a single pest can destroy the entire crop.
举个极端的例子，以单一作物为主的农田是如此不稳定，一年的坏天气或单一害虫的入侵可以摧毁整个作物。
3
Pasture is the most important singlecrop in British agriculture.