When someone is effusive, they do not keep their good feelings quiet. They pour them out — big thanks, big praise, a welcome that goes on a bit. An effusive thank-you, an effusive review, an effusive host: the warmth is easy to see and hear.

When someone is effusive當一個人 effusive 的時候 they do not keep their good feelings quiet他們不會把好心情藏起來不說 They pour them out他們會把感情一股腦倒出來 big thanks, big praise, a welcome that goes on a bit像是大大的道謝、大大的讚美，或是一直說個不停的歡迎詞 An effusive thank-you, an effusive review, an effusive hostan effusive thank-you（熱情洋溢的感謝）、an effusive review（熱情洋溢的評論）、an effusive host（熱情洋溢的主人） the warmth is easy to see and hear那種熱情是很容易看得到、聽得到的

The word is a little formal; friends more often say “she was so enthusiastic” or “he really went on about how good it was.” It is not a rude word, but it can carry a small smile: the speaker notices that the feeling is being shown in a very big way, sometimes more than the moment needs. Use it for warm, happy feeling, not for anger.

The word is a little formal這個字有點正式 friends more often say "she was so enthusiastic" or "he really went on about how good it was."朋友之間比較常說「she was so enthusiastic」或「he really went on about how good it was」 It is not a rude word這不是一個粗魯的字 but it can carry a small smile但可能帶點會心一笑的味道 the speaker notices that the feeling is being shown in a very big way說話者注意到對方把感情表現得非常誇張 sometimes more than the moment needs有時候超過那個場合真正需要的程度 Use it for warm, happy feeling用在溫暖、開心的情緒上 not for anger而不是憤怒

There is an old science use (lava or gas pouring out of the ground), but learners almost never meet that.

There is an old science use還有一個古老的科學用法 (lava or gas pouring out of the ground)（指岩漿或氣體從地底湧出） but learners almost never meet that但學習者幾乎不會遇到這個用法