at once片語KK [æt wʌns] /æt wʌns/發音片語1立刻、馬上、即刻The manager asked us to stop the machine at once.經理要求我們立刻把機器停下來。2同時、一起Please don't all talk at once; I can't hear anyone.請不要大家同時講話,我一個人也聽不清。3既…又…、兼具正式Her voice was at once gentle and full of authority.她的聲音既溫柔又充滿威嚴。