hoarding and speculation的用法和样例：
例句
- We must take strong measures against actions of hoarding and profiteering that upset the market.
我们必须严厉打击囤积居奇，扰乱市场秩序的行为。 - The government's consumer watchdog accuses them of hoarding and speculation, complaining that they are selling under the counter to restaurants at a higher price.
而政府的消费者监督机构则指责他们囤积居奇，抱怨说他们正在暗地里以更高价格向饭店销售。
