翻译句子一旦玛丽下定决心，就绝不会动摇。(waver)
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What happened to the plane the author took that Friday morning?
How did the passengers’ reaction change with the development of the situation?
翻译句子他在会上提出了一系列可能避免环境污染的措施。(ward off)
翻译句子被警察询问时，杰夫极力保持冷静，沉着地回答每个问题。(composure)
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