sample proportion of successes

例句：

1. 1.We need to take a sample of the soil for testing.
   我们需要取土壤样本进行测试。
2. 2.The company provided us with a sample of their new product.
   公司给我们提供了他们新产品的样品。
3. 3. The scientist analyzed the sample and found it to be contaminated.
   科学家分析了样品，发现它被污染了。