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6. were advised not to travel to that country at the moment
「超级单词」advise 一般用法： advise sb. to do; advise doing
特殊注意： 后面的宾语从句要用虚拟语气。即：advise that sb. (should) do的形式。
7. he devoted himself to the community
「超级短语」be devoted to 有两个含义：A.专心致志于，献身于;B.热爱，很喜欢。作为动词的devote常用下列成语类的搭配：devote oneself/one's life to sth/doing sth.
8. at the cost of sacrificing/loss of other species
「超级短语」at the cost of(以……为代价)，其含义和用法与at the expense of相同。另at all costs意为"不惜一切代价".
9. attributed it to her firm belief in the future
「超级短语」"attribute……to"，"把……归因于……"是大学英语四级考查率极高的一个语言点。
10. and not to let their parents down
「超级短语」let……down(使……失望)，形容词表示失望有disappointed.
