形容词
中文翻译：突然的
同义词：
['abrupt', 'sudden', 'swift例句：1. The sudden drop in temperature caused the leaves to turn yellow.（温度的突然下降导致树叶变黄。）']
例句：
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1. The sudden drop in temperature caused the leaves to turn yellow.
温度的突然下降导致树叶变黄。
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2.He suddenly realized that he had forgotten his keys at home.
他突然意识到他把钥匙忘在家里了。
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3. The sudden appearance of a storm caught everyone off guard.
突如其来的暴风雨让每个人都措手不及。