副词短语
中文翻译：突然
同义词：
['suddenly', 'simultaneously例句：1. She arrived all at once and was surprised by the unexpected meeting.（她突然到达，对意外的会面感到惊讶。）2. They decided to all at once start their new project.（他们决定突然开始他们的新项目。）3. The sudden rain all at once made us rush for shelter.（突如其来的雨让我们急忙寻找庇护所。）']
例句：
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1. She arrived all at once and was surprised by the unexpected meeting.
她突然到达，对意外的会面感到惊讶。
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2. They decided to all at once start their new project.
他们决定突然开始他们的新项目。
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3. The sudden rain all at once made us rush for shelter.
突如其来的雨让我们急忙寻找庇护所。