a downgrading of diplomatic relations的用法和样例：
- S. diplomatic relations with Syria.Officials have not said when Ambassador Scobey might return to Damascus, but they say her recall is not a permanent downgrade of diplomatic ties.
- The two nations have decided on the establishment of diplomatic relations.
- Appraisal work at the field, due to enter production this month, has caused a downgrading of reserves.
- The minister denied reports that normalization of diplomatic relations be tween the two countries might be imminent.