### Chinese: 美国希望各国在计划于2022年底举行的实体民主峰会前，作出具体的公开承诺，以改善其民主制度。
### English: The U.S. hopes that countries will make concrete public commitments to improve their democratic systems ahead of the planned Real Democracy Summit in late 2022.
### Errors: There is a major error of incorrect translation is missing content from the correct translation at "Real Democracy Summit". There is a minor error of incorrect translation has stylistic problems at "hopes instead of wants".

### Improved English: The U.S. wants all countries to make specific and open promises before the democratic summit held at the end of 2022, so as to improve the democratic system.