介词短语
中文翻译：以防万一
同义词：
['in the event of', 'in case of', "in the event of例句：1. I'll be back in a few hours", "so just stay here and don't worry.（我几个小时后回来，所以请待在这里，不要担心。）2. In case you need any help", 'please call me at home.（如果你需要任何帮助，请打电话给我在家。）']
例句：
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1. I'll be back in a few hours, so just stay here and don't worry.
我几个小时后回来，所以请待在这里，不要担心。
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2. In case you need any help, please call me at home.
如果你需要任何帮助，请打电话给我在家。
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3.We should take an umbrella in case it rains.
我们应该带把伞以防下雨。