at once
Collocation
例子
The manager approved the request at once, recognizing its urgency.
经理立即批准了请求，认识到了它的紧迫性。
02
立即, 同时
occurring or happening simultaneously
例子
The rain poured and the wind howled at once, making the storm feel more intense.
雨倾盆而下，风同时呼啸，使风暴感觉更加猛烈。
