He is constantly on guard against any threat of humiliation.他时刻提防着任何有辱尊严之事。Police were on guard at Barnet town hall.警察在巴尼特市政厅值守。Two soldiers must be on guard all night.必须有两个士兵撤夜站岗....
Tourist numbers from across the pond have dropped dramatically.来自大西洋彼岸的游客数量已急剧减少。The population explodes to 40,000 during the tourist season.旅游季节，人口激增至4万。This money is intended for the development of the tourist industry...