User contribution to Web sites is often a spontaneous affair.

用户对Web站点作出贡献通常是一种自发的行为。

youdao

"Songbirds have a spontaneous ability to process syntactic structures in their songs," he says.

他说，“鸣禽在歌唱时有加工句法结构的自然能力。”

youdao

American audiences prefer natural, spontaneous delivery that conveys a lively sense of communication.

美国观众更喜欢自然、自发的表达方式，传达一种生动的交流感。

youdao

U.S.officials say there was spontaneous applause at the meeting, at a New York hotel, when word arrived of Senate approval of the five-year Pakistan aid plan, which would triple civilian U.S.assistance to about Expected to win final approval in the U.S.

VOA: standard.2009.09.24

When a new male lion takes over a pride what he does is kill all the remaining cubs and any lionesses undergo spontaneous abortions.

当一个新雄狮接管领地,它将杀死留下的幼仔,和任何经历过自然流产的雌狮。

耶鲁公开课 - 心理学导论课程节选

The females do their spontaneous abortions because that's a reliable adaptive trick.

自然流产时雌狮用的适应技巧。

耶鲁公开课 - 心理学导论课程节选

Do you think it was a spontaneous protest against a movie?

WHITEHOUSE: Press Briefing

Paco Moncayo, a respected former army commander, claimed the coup was a spontaneous effort by a handful of officers, not a sign of a real split.

ECONOMIST: Ecuador��s post-coup reckoning

She implied at the time that her apology for the targeting, conveniently timed to front-run the Treasury IG report, was a spontaneous answer to a surprise question from the audience.

WSJ: Review & Outlook: Merely a Tax Misunderstanding