“镇定剂”用英语怎么说

他给一位在绝望中挣扎的总统提供了心理镇定剂.He furnished psychological ballast to a desperate President.红色的是镇定剂和血液缓流飞镖.And the red ones are tranquilizer and blood - splatter darts.镇定剂有时用于治疗紧张.Tranquilizers are often used in the treatment of t...