contingents
A contingent of police, soldiers, or military vehicles is a group of them.
Nigeria provided a large contingent of troops to the West African Peacekeeping Force.
尼日利亚向西非维和部队派出了一大批部队。
A contingent is a group of people representing a country or organization at a meeting or other event.
The American contingent will stay overnight in London.
美国代表团将在伦敦留宿。