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board up用木板封住, 用木板隔断
例句：Board the door up.
用木板把门封住。
They have boarded up the hole in the wall.
他们用木板把墙上的洞封起来了。
2.But in opposition, Justice John Paul Stevens argued the government can't lawfully endorse a religious symbol as a way to pay tribute to veterans.
pay tribute to称赞, 歌颂
例句：I want to take this opportunity to pay a public tribute to him.
我愿借此机会公开各他表示敬意。
3.It has gripped the Asian country for a while now, and fighting broke out again yesterday.
break out(战争、打斗等不愉快事件)突然发生, 爆发
例句：Something unexpected always breaks out in this area.
在这一地区总有意想不到的事情发生。
The Second World War broke out in September 1939.
第二次世界大战爆发于1939年9月。
4.Police forces facing off against protesters who are opposed to the government.
face off对峙
