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

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 bleeding often stops spontaneously.

这种出血常常会自己停止。

Hearing the joke, we burst into spontaneous laughter.

听到笑话, 我们不由自主地大笑起来.

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.

We spontaneously started to dance.

我们情不自禁地跳起舞来。

The crowd gave a spontaneous cheer.

人群自发地欢呼起来。

a spontaneous offer of help

主动提出帮助

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.

I joined in the spontaneous applause.

我跟着也自然而然地鼓起掌来。

spontaneous remission of the disease

疾病的自然缓解

He made a spontaneous offer of help.

他自愿提供帮助.

a tape recording of spontaneous speech

一段自然讲话的磁带录音

My spontaneous reaction was to run away.

我的本能反应就是逃跑。

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。

As for the final of pregnancy, spontaneous abortion 1 case, induced labor 2 cases and hysterotomy 2 cases.

妊娠结局:1例自然流产, 2例引产,2例行择期剖宫产.

It'suggests that there is a relationship between spontaneous abortion and HPV B 19 infection.

结论可能人细小病毒B19感染与自然流产有一定关联.

Objective To study the relationship between chromosome abnormality and repeated spontaneous abortion.

目的:讨论患者夫妇外周血染色体异常与反复流产的关系.

The spontaneous abortion rate was 0.27 %.

观察到流产率为0.27%.

Objective To study the variation of peripheral blood NK Sub-class ratio in recurrent spontaneous abortion.

目的研究自然杀伤(NK)细胞亚群比例变化与复发性自然流产(RSA)的关系.

Abortion can also be classified into spontaneous abortion and artificial abortion based upon the underlying causes.

也可根据潜在原因分为自然流产和人工流产.