4.A peaceful demonstration had been hijacked by anarchists intent on causing trouble.
和平示威已遭到蓄意制造事端的府主义者的操控。文中 hijacked hijack 的过去分词形式(相当于形容词) ,修饰 social media trends,意思:被操纵的热搜,就我们平时说的“花钱买热搜”。讲个冷笑话,如果你有个朋友叫 Jack ,在飞机偶然见到他之后, 打招呼可不要随说 Hi。
16.Czolgosz also was mentally ill. He had tried to join several anarchist groups. They refused to accept him, however, because of his mental condition.