形容词
中文翻译：不确定的
同义词：
['doubtful', 'in doubt', 'unsure']
例句：
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1. I am uncertain about the outcome of the meeting.
我对会议的结果感到不确定。
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2. He was uncertain about whether he would be able to attend the party.
他不确定自己是否能参加聚会。
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3.The weather forecast is uncertain, so we should prepare for rain.
天气预报不准确，所以我们应该为下雨做准备。