He made progress in fits and starts at first but now he’s improving rapidly.
开始时,

步时断时续,但现
提高得很快。
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代周刊 (Time) And so as the summit over North Korea's nuclear weapons veers from on-again to off-again, the world should consider the thinking of three distinguished U.S. military officers- two of whom just took pivotal posts in these turbulent times.
因此,既然有关朝鲜核武器的峰会
断
续,国际社会就应该分析分析美国三大军官的思维方式——其中两人都是刚刚
整个风云变幻的
代接任了关键职位。