A New Jersey black bear that walks upright on its two back legs and has become a social media darling has re-emerged and has been captured on video months after its last sighting.

一头用两条后腿直立行走的新泽西州的黑熊已经成为社交媒体的宠儿，距离上次被目击的几个月后，它再次出现并被拍了视频。

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To prove it, he threw two back air-springs, and the police captain gave in.

为了证明这一点，他向后连跳了两下，那个警官就退让了。

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ChaCha answers questions you ask by text message, and sends the answer and an AD or two back to your phone.

Chacha可以告诉你通过短信息提的问题，它会将答案发送到你的手机上，当然也会附带送你一到两条广告信息。

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Mattel agreed to change it. That was back in nineteen ninety-two, the same year as the first Barbie for President doll.

VOA: special.2009.04.06

This suitcase had--instead of having four little wheels on the bottom, it had two wheels on the back.

这种旅行箱不是四个轮子都在底部，而是在后面有两个轮子。

耶鲁公开课 - 金融市场课程节选

And then he goes back to hell and then back up to heaven -goes back and forth between these two rhythmically very different concepts.

然后它回到了地狱,接着又升到了天堂,在这两种节奏非常不同的概念之间,来回往复

耶鲁公开课 - 聆听音乐课程节选

She became the first artist to sell-out two back-to-back nights at the Nokia Theatre in Los Angeles, California, in 2010.

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There's also a new in-camera HDR mode which merges two back-to-back shots (one underexposed and the other overexposed) in order to retain additional shadow and highlight detail.

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Superficially the stories heralded the introduction of Apple's retro-futuristic-looking iMac desktop (see "Back to the future"), but fresh off two back-to-back profitable quarters (the first in three years) the underlying message was clear: Apple is back.

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