Usually, they have different designs on the two sides.

通常情况下，硬币正反有着不同的设计。

Let's spin a coin to decide who'll have the first turn.

让我们抛转硬币（猜正反面）来决定谁先开始。

To do this, we showed 14 to 24-month-old infants how to activate a toy robot, and importantly, we either assigned a positive value, saying " Wow, isn't that great! " or a negative value, saying, " Oh, oh. Oops, oh no, " after pressing the remote.

为做到这一点，我们向 14 到 24 个月大的婴儿演示如何激活一个玩具机器人，重要的是，我们要么给一个正反，，“，真棒！”要么给一个负反，，“哦，噢。天哪，不，”当按下遥控器的时候。

There seem to be two sides to the argument.

这项争议似乎正反两面都有人支持。

The doctor reminded the patient to complete both sides of the health history form.

医生提醒病人填写健康史的正反面。

The instability is a positive feedback loop.

这不稳定性是正反回路。

That is both literally and metaphorically a positive feedback loop.

无论是从直观还是隐含的角度看，这都是一个正反循环。

If I understand the matter of all, science and art are the obverse and reverse of the Nature's medal; the one expressing the external order of things, in terms of feeling, and the other in terms of thought.

依我所见，科学和艺术实乃大自然这枚圣牌的正反两面，一个以情感的方式事物的外在规律，而另外一个则是一理性的方式。

So you know how we keep bringing up the light and dark sides of influence?

所以你知道我们是如何不断地在谈影响的正反两面的吗？

But the world is full of opposites, and so are you.

但这世界都是正反两面的，你们也是。

You must decide whether, on the balance of probabilities, he committed the crime.

【probability】你们一定要权衡正反两方面的可能性，然后再裁定他是否犯罪。

And as more people chose to move to Colorado for the better job opportunities and the outdoor recreation lifestyle, it generated a sort of positive feedback loop where in Colorado's economy steadily became more and more diversified than Wyoming's.

随着越来越多的人为更好的工作机会和户外休闲生活方式而选择搬到科罗拉多州，它产生一正反循环，科罗拉多州的经济稳步变得比怀俄明州的经济越来越多样化。

(Laughter) She said my account was being locked due to concerns about its inaccuracy. So I sent her back a photo of my license, front and back, to prove that my name was, in fact, Chris Duffy.

（笑声）她告诉我，由于对账户信息准确性的担忧， 我的账户被暂时锁定。 于是，我给她发去我的驾照正反面照片， 以证明我的名字确实是克里斯·菲。

They exhibit strong “network effects” : a growing group of one sort of customer attracts more of the other, which again draws in more of the first and so on.

“强大的网络效应” : 某类客户群的增长会吸引更多的使用者，以此类推形成正反。

And really, all it is, is just a piece of wood, with a few lines cut into it from opposing directions, and it has a springy quality to it.

白它只是一块普通木料，从正反两个方向切出几道缝隙，木料自身就会形成弹性回弹的效果。

So these old pennies soon became so smooth that one could not tell " head" from " tail, " or indeed see any letters on the pennies at all.

所以， 这些老硬币很快就会磨得太光， 连正反面都看不出来， 便士上的字母更是磨得一个也看不见。

There's always two sides to an argument and it's something that's been discussed on BBC Radio 4's Farming Today programme.

争论总是有正反两观点，这早已在BBC广播4频道《今日农业》节目上有所讨论。

Do you analyze all the data at hand exhaustively, write out pro and con lists, think logically through a problem?

你是否会详尽地分析手头所有的数据，列出正反两方面的意见，有逻辑地思考问题？

Read this opinion article from a newspaper, followed by cuttings from the Letters to the Editor section, too see both sides.

阅读这篇来自报纸的评价文章，“读编往来”板块的剪报，解正反面观点。

And the bigger and clearer one side of the coin became, the bigger and clearer the other side became too.

当一面变得更大、更清晰时，另外一面也随之变得大而清晰。生与死正是一枚钱币的正反两面。