动词
中文翻译：默认
同义词：
['fall back on', 'rely on', 'depend on']
例句：
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1. When theweather forecast was wrong, we had to default to a rainy day.
当天气预报错了，我们不得不默认下雨天。
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2.The company decided to default on their promise of a new product launch.
公司决定不兑现他们的新产品发布会的承诺。
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3. We defaulted on our commitment to finish the report by the end of the month.
我们没有完成承诺在月底前完成报告。