adj.(形容词)

1. 自发的，自然的，自生的，自动的
2. 无意识的，不由自主的，本能的
3. 自身造成的
4. 无雕饰的，自然流畅的

adv.(副词)

1. 自生地，自然地，无意识地

adj.(形容词)

1. 自发的,无意识的 done,happening,said,etc. because of a voluntary impulse from within,not caused or suggested by sb/sth outside
2. 自然的,天真率直的 natural,not forced

Adjective:

1. happening or arising without apparent external cause;

   "spontaneous laughter"
   "spontaneous combustion"
   "a spontaneous abortion"
   

2. said or done without having been planned or written in advance;

   "he made a few ad-lib remarks"
   

1.(行为)自然的，自发的
spontaneous acts are not planned or arranged, but are done because someone suddenly wants to do them.

e.g. Diana's house was crowded with happy people whosespontaneous outbursts of song were accompanied by lively music...
戴安娜的家里挤满了兴奋的人们，他们伴着欢快的音乐不由自主地引吭高歌。
e.g. I joined in thespontaneous applause.
我跟着也自然而然地鼓起掌来。

spontaneously
As soon as the tremor passed, many people spontaneously arose and cheered...
震感刚一过去，很多人就自发地站起来欢呼。
He was never spontaneously warm or friendly towards us.
他从未自然而然地对我们表示过热情或友好。

2.自然的，自发的(指由于内部原因而非外界影响所引起的)
Aspontaneous event happens because of processes within something rather than being caused by things outside it.

e.g. I had anotherspontaneous miscarriage at around the 16th to 18th week.
我在大约第 16 至 18 孕周时又经历了一次自然流产。
e.g. ...aspontaneous explosion.
自爆

spontaneously
Usually a woman's breasts produce milk spontaneously after the birth...
女性的乳房通常在产后会自然泌乳。
These images surface spontaneously in dreams.
这些影像在梦中自然地浮现出来。

用作定语～+ n.

1. Her successful jump brought a spontaneous cheer from the crowd.
   她成功越过横竿后,观众立即发出一阵欢呼声。

用作表语S+be+～

1. The eruption of a volcano is spontaneous.
   火山的爆发是自发的。

• Stories and poems were springing into spontaneous creation in his brain.

  出自：J. London

• Edward clapped his hands briskly,..a spontaneous gesture.

  出自：G. Gordon

• The applause was spontaneous, even heartfelt.

  出自：W. F. Buckley

• When they met for the first time it was with spontaneous and mutual antipathy.

  出自：D. Madden

He is spontaneous to offer help.

他主动提供帮助。

It is a spontaneous cheer from the crowd.

那是群众自发的喝彩。

The spontaneous applause cut the singer short.

自发的掌声打断了歌唱家的演唱。

The eruption of volcanoes is spontaneous.

火山爆发是自然产生的。

The spontaneous combustion of the oil-soaked rags caused the barn to catch fire.

油布碎片的自燃使谷仓起火。

a spontaneous offer of help

主动提出帮助

The audience burst into spontaneous applause.

观众自发地鼓起掌来。

spontaneous remission of the disease

疾病的自然缓解

a tape recording of spontaneous speech

一段自然讲话的磁带录音

a wonderfully spontaneous performance of the piece

对那支乐曲极其淳朴自然的演奏

We spontaneously started to dance.

我们情不自禁地跳起舞来。

The bleeding often stops spontaneously.

这种出血常常会自己停止。

Diana's house was crowded with happy people whose spontaneous outbursts of song were accompanied by lively music...

戴安娜的家里挤满了兴奋的人们，他们伴着欢快的音乐不由自主地引吭高歌。

I joined in the spontaneous applause.

我跟着也自然而然地鼓起掌来。

I had another spontaneous miscarriage at around the 16th to 18th week.

我在大约第 16 至 18 孕周时又经历了一次自然流产。

...a spontaneous explosion.

自爆

Objective To cure various clinical manifestation of spontaneous pneumothorax ( SP ) through various measures.

目的通过对多种自发性气胸的临床表现采用不同的治疗方法,达到治愈的效果.

The interfacial reactions enhance the wettability and promote the spontaneous infiltration process.

界面反应的存在提高了润湿性,促进了无压自发浸渗.

The ascites cell register and the bacilliculture are the spontaneous peritonitis ( SBP ) diagnosis basis.

腹水细胞记数和细菌培养是自发性腹膜炎 ( SBP ) 的诊断依据.

Objective : To explore the diagnosis and surgical management of spontaneous chylothorax.

目的: 探讨自发性乳糜胸的诊断及手术治疗.

Drawing and learning is spontaneous behavior and broadening knowledge yourself.

绘画与学习应出于自发性,及保持自己对知识的渴求.

The eruption of a volcano is spontaneous.

火山的爆发是自发的.

A smile isn't a gesture of spontaneous joy, it's a social thing.

微笑不是内心喜悦的表现, 而是一种社交行为.

Although some patients with membranous nephropathy achiee spontaneous remission, renal function continues to deteriorate in others.

虽然膜性肾病具有自限性,但是在一些患者肾功能可能持续恶化.

This task is used to collect a spontaneous speech sample from the test taker.

这个部分是用来从受测试者之中收集真实的语音样本.

He made a spontaneous offer of help.

他自愿提供帮助.

Objective : To identify the risk factors of spontaneous premature delivery.

目的: 探究自然早产的高危因素.

spontaneous abortion includes accidental spontaneous abortion and recurrent spontaneous abortion.

自然流产包括偶然性自然流产和习惯性自然流产.

spontaneous combustion of coal constitutes a very serious problem in North China.

中国北方煤田煤层自燃现象非常严重.

Objective To investigate the application of closed thoracic drainage with thin tube on patients spontaneous pneumothorax.

目的探讨细管胸腔闭式引流在自发性气胸治疗上的应用.

Hearing the joke, we burst into spontaneous laughter.

听到笑话, 我们不由自主地大笑起来.

They add a surprisingly high rate of spontaneous defibrillator activations, often occurring late after MI. ''

他们补充:“经常在心肌梗塞的晚期,除颤器自发激活的比率惊人地高. ”

Sometimes adhesive products appear on the shadow of spontaneous , mainly anisotropism ink.

有时不潮胶产物上会不入不隐云雾状的影子, 这不宾给是匀不朱不陡衡造不败.