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1·Many people spontaneously stood up and cheered.

许多人自发地站起来欢呼。《柯林斯英汉双解大词典》

2·Usually a woman's breasts produce milk spontaneously after the birth.

通常女性在生孩子后乳房会自然泌乳。《柯林斯英汉双解大词典》

3·It's whether a species has developed this ability spontaneously.

是一个物种是否自发地发展了这种能力。

4·They spontaneously embrace and are linked forever if the book lasts forever.

他们不由自主地相拥，只要作品永存，他们就永不分离。

5·It can be naturally generated from Uranium atoms that have spontaneously split.

它可以由自发分裂的铀原子自然生成。

6·Her observations helped dismiss the popular belief that insects spontaneously emerged from mud.

她的观察有助于驳斥一种普遍观点，即昆虫会从泥土中自然出现。

7·We spontaneously started to dance.

我们情不自禁地跳起舞来。《牛津词典》

8·The bleeding often stops spontaneously.

这种出血常常会自己停止。《牛津词典》

9·For reasons that aren't yet well understood, cloned animals often abort spontaneously or are born with defects.

由于无法搞懂的原因，克隆动物通常会自行流产，或者具有天生缺陷。

10·He suggested to Malcolm McDowell, who played Alex de Large, that he add in a little dance spontaneously during the next take.

他建议扮演亚历克斯·德·拉杰的马尔科姆·麦克道尔在接下来的拍摄中即兴加入一点舞蹈。