本期内容：

Hundreds of passengers in a Dallas airport took a moment out of their travels to witness the return of a fallen Vietnam War veteran. Col Roy Knight Jr had last seen his family at this same airport 52 years before, when they came to say goodbye before he went to war. His return presented a rare moment of unity in the US, following a pair of mass shootings in Texas and Ohio that have shaken the country.

out of: 总量中的多少部分
· 5 out of 10 students forgot to finish their homework.
10个学生中有5个都忘记完成家庭作业了。
fallen adj. 阵亡的；落下的
· allen heroes: 阵亡的英雄
· fllen leaves: 落叶
veteran n. 老兵；（某领域内的）老手
· a political veteran: 一个老政客
Col: colonel的缩写，指“上校”
Jr: junior的缩写（晚辈是junior，长辈就叫senior）
present vt. 展现，出现；产生
present adj. 现在的，眼下的；n. 礼物
a rare moment of unity: 罕见的团结时刻
· rare adj. 稀罕的，稀有的
rare animals: 珍稀动物
· a moment of... ……的时刻
a moment of joy: 欢乐的时刻
a moment of desperation: 绝望的时刻
mass shootings: 大规模枪击

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