Usually, they have different designs on the two sides.

通常况下，硬币正反有着不同设计。

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.

为了做到这一点，我们向 14 到 24 个月大婴儿演示了如何激活一个玩具机器人，重是，我们一个正反馈，说，“哇，真棒！”一个负反馈，说，“哦，噢。天哪，不，”当按下遥控器时候。

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表正反面。

The instability is a positive feedback loop.

这不稳定性是正反馈回路。

That is both literally and metaphorically a positive feedback loop.

无论是从直观还是隐含角度看，这都是一个正反馈循环。

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正反两面，一个以方式表达了事物外在规律，而另外一个则是一理性方式。

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正反两面吗？

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

但这世界都是正反两面，你们也是。

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

【probability】你们一定权衡正反两方面可能性，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.

随着越来越多人为了更好工作机会和户外休闲生活方式而选择搬到科罗拉多州，它产生了一正反馈循环，科罗拉多州经济稳步变得比怀俄明州经济越来越多样化。

(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担忧， 我账户被暂时锁定。 于是，我她发去了我驾照正反面照片， 以证明我名字确实是克里斯·达菲。

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.

“强大网络效应” : 某类客户群增长会吸引更多使用者，以此类推形成正反馈。

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.

说白了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， 便士上字母更是磨得一个也看不见了。

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数据，列出正反两方面意见，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.

阅读这篇来自报纸评价文章，“读编往来”板块剪报，了解正反面观点。

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正反两面。