n.出现，到来，基督降临节（圣诞节前的四个星期）
the advent of new technology
新技术的出现
The advent of the Euro will redefine Europe.
欧元的出现将重新定义欧洲.
Swallows come by groups at the advent of spring.
春天来临时燕子成群飞来.
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