给出一个英文文本，让GPT模型生成一个程序来计算文本中包含的不同单词数量。


text = "Big data refers to the use of data sets that are so voluminous and complex that traditional data processing application software is inadequate to deal with them."
以下是一个Python程序，用于计算给定英文文本中包含的不同单词数量。首先，文本被转换为小写字母，然后被拆分成单词列表。最后，使用set()函数获取单词列表中的唯一单词数量。

```python
text = "Big data refers to the use of data sets that are so voluminous and complex that traditional data processing application software is inadequate to deal with them."
words = text.lower().split()
unique_words = len(set(words))
print(unique_words)
```

输出为：14