If no past parameter is specified, then all of the messages are returned.

如果没有指定past参数，那么返回所有消息。

youdao

And I say to both my house and the road, "I have no past, nor have I a future."

我对我的房子和道路说，“我没有过去，也没有将来。”

youdao

Sometimes you have no past customer history to go on when choosing a new market niche.

有时，当你选择一个新的市场利基时，你可能失去所有的旧客户。

youdao

Bourke-White was no longer satisfied just to show the products of industry in her pictures, as she had in the past.

VOA: special.2009.05.17

This cell can only be an effective barrier if there's no way to get past it.

这些细胞只有密不透风,才足以形成一道屏障

耶鲁公开课 - 生物医学工程探索课程节选

So, by no means is it a part of what we've done in the past.

所以这并不是,我们曾经做过的事情。

普林斯顿公开课 - 人性课程节选

But as Sheikh Zayed once said, a country with no past "has neither a present or a future".

BBC: Al Ain: The desert��s oasis

No past profile or personal data is used, and recommendations are based entirely on user behavior from that specific interaction.

FORBES: Making Sense Of Online Personalization And Privacy

He ran down the great wastes of the roaring forties, reaching a state of grace in a world, he felt, with no past or future.

ECONOMIST: The hubris of racers today