verb, punctuation · to appear on the scene or take part in a situation figuratively

就在这个关键时刻，一个神秘人物登场了。

verb · to step onto a stage for a performance

演员已经画好妆，准备登场。

verb · to be released or introduced as a new product in advertising

下周，这款全新的智能手机将正式登场。