?spontaneously [spɑ?n'te?n??sl?]

用法：副詞，表示自發(fā)地、自然地、無意識地。

例句：

1. The children spontaneously burst into laughter when they saw the clown.

孩子們看到小丑時自然而然地笑了起來。

2. The flowers in the garden grew spontaneously without any human intervention.

花園里的花自然生長，沒有任何人為干預。

3. He spontaneously offered to help his neighbor carry the heavy groceries.

他主動提出幫助鄰居搬運沉重的雜貨。

4. The audience was moved to tears when the singer spontaneously dedicated a song to his late mother.

歌手自發(fā)地把一首歌獻給已故的母親，觀眾被感動得熱淚盈眶。

5. The idea for the new product came to her spontaneously while she was taking a shower.

她在洗澡時突然想到了新產(chǎn)品的構思。

同義詞及用法：

1. voluntarily (adv.) 自愿地，主動地

2. instinctively (adv.) 本能地，天性地

3. unconsciously (adv.) 無意識地，不知不覺間

4. impulsively (adv.) 沖動地，莽撞地

編輯總結(jié)：

spontaneously是一個表示自發(fā)、自然、無意識的副詞。它可以用來描述人們做出的行為或反應，也可以用來形容事物的發(fā)展或變化。它的同義詞包括voluntarily、instinctively、unconsciously和impulsively，但每個詞都有著不同的側(cè)重點。在使用時，需要根據(jù)具體語境選擇合適的詞匯。