t unbreakable
t牢不可破
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Why aren't they as sensitive to their customers' time, especially that of business travelers, who pay a disproportionately high share of airfares because they can't make unbreakable reservations a month or two in advance the way vacationers can?
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