Thereupon means happening immediately after something else has happened and usually as a result of it.
例句
Some months ago angry demonstrators mounted a noisy demonstration beneath his window. His neighbours thereupon insisted upon more security.幾個月前，憤怒的示威者在他的窗下發起了鬧哄哄的抗議活動，隨后他的鄰居們堅決要求加強安全防范。
英漢詞典釋義
adv.
<正>因此;于是
Thereupon, we knew, our endeavor was valuable.于是，我們知道，我們的努力是有價值的！
<正>立即;隨即
He thereupon asked her to marry him.他隨即向她求婚。The police arrived. Thereupon the mob scattered.警察來了,這群烏合之眾也隨之散去。
在其上
The knight carried a shield with a cross painted thereupon.騎士拿著繪著十字的盾牌。
英英詞典釋義
Adverb
1. immediately after that;
"thereupon the entire class applauded""with that, she left the room""I therewith withdraw my complaints"