If failed, -1 is returned.

如果调用失败，将返回- 1。

youdao

I immediately embarked on an experiment which, even though if failed to get rid of the ants, kept me fascinated for twenty-four hours.

我当即动手作了一项试验，这项试验尽管没有使我摆脱这些蚂蚁，却使我着迷了24小时。

youdao

Her parents did not approve of her decision and, if she failed, her mother would say, "I told you so."

她的父母没有同意她的决定，如果她失败了，她的母亲就会说，“我早跟你说过。”

《柯林斯英汉双解大词典》

Brown said even if the rebellion failed, it would probably lead to a civil war between North and South.

VOA: special.2009.06.18

So there was a big bank run and Northern Rock would have failed if the Bank of England hadn't come by to rescue them.

从而出现挤兑狂潮,若非英格兰银行施以援手,北岩银行恐怕早就倒闭了

耶鲁公开课 - 金融市场课程节选

People were pulling money out of banks because they feared that if the bank failed, then they would lose their money; it created a huge crisis in 1933.

人们纷纷从银行提取现金,因为他们担心,万一银行破产,他们就会血本无归,这种情况导致了1933年经济危机

耶鲁公开课 - 金融市场课程节选

And he vowed to act on climate change himself if Congress failed to enact legislation.

BBC: State of the Union: Obama pledges to reignite economy

Merkel said further sanctions would follow if Iran failed to meet its commitments.

CNN: Bush: No regrets over Iraq invasion

If Solo failed to meet certain commitments, Vestar could elect a majority to the board.

FORBES: Party's Over