### Chinese: 这是减缓海湾合作委员会国家经济增长的因素之一。
### English: This is one of the factors that slowed the country's economic growth in the Gulf Cooperation Council.
### Errors: There is a minor error of incorrect translation is missing content from the correct translation at "the country's instead of the countries".

### Improved English: This is one of the factors that slow down the economic growth of the Gulf Cooperation Council countries.