在公共场合是in public 还是on public

“在公共场合”是in public place 还是in public places? “在公共场合” 用英语怎么说,是in the public places 还是in publi 那个男生早已习惯在公共场合发言(英语翻译,用in public) 是in the public place还是in public place 英语public这个词用于在公共地点不要大声说话是前面加in 还是on 是at the public place还是in the public place in public 还是in the public It was the first time that I spoke in public.这是我第一次在公共场合发言. 在公共场合最好小点声 译英：It's better not to be loudly in public places. in public “在公共场合”用英语表达为 in ( ) public.请问括号内是否应填“the"?并说明理由. 在酒吧是该用in a public house还是用at