observe silence短语¹⁴⁴⁹⁷²⁺² 基本例句 保持沉默 I am for those students to observe silence for the victims! 我为那些遇难的学生们默哀！ blog.sina.com.cn Please observe silence in God's Temple! 在神的殿中请保持肃静！ mhccc We must observe silence in the classroom. 我们在教室里必须保持肃静。 kuenglish