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at once
01
立即
immediately or without delay
02
立即
a systematic method of diagnosing a disorder (e.g., headache) that lacks unique symptoms or signs
03
立即
simultaneously
例子
The emergency team was dispatched at once to the accident site.
The manager approved the request at once, recognizing its urgency.
He addressed the issue at once to prevent further complications.
Realizing the danger, they evacuated the building at once.
The system detected the error and corrected it at once.
