Rather than merely a sign, it is the root from which we can trace back to our ancestor, the tie that helps bind us to other members of the same clan, the dignity most people hope to live for.

它不仅仅是一种标志，更是我们可以追溯到祖先的根源，是将我们与同族其他成员联系在一起的纽带，是大多数人希望为之而活的尊严。

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Noodles are a sign of long life for us.

面条对我们来说是长寿的象征。

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It is important for us to have our eyes examined regularly to check for any sign of eye disease.

定期检查眼睛是否有眼疾症状对我们来说很重要。

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All of us are really feeling the effect, and therefore the need to sign.

VOA: standard.2009.10.13

Infinity is the force when we're thinking about it and our brains, negative infinity is when we actually plug it into the equation here, and the reason is the convention that the negative sign is just telling us the direction that the force is coming together instead of pushing apart.

说力有多大时，我们想到的,是无穷大，而方程解出来的,是负无穷，这是因为习惯上,我们用负号表示力的方向,是相互吸引而不是相互排斥的,所以我们可以用库仑定律。

麻省理工公开课 - 化学原理课程节选

So if the firms wanted to make more money, the only thing they could do is they could sign an agreement saying, why don't each of us produce not our Cournot quantity, but produce half monopoly profits.

所以如果你们想多赚钱,唯一能做的就是签协议,我们不要按古诺产量生产了,各自生产垄断利润的一半多好呢

耶鲁公开课 - 博弈论课程节选

Unlike in, for example, the European sovereign bond market, there is no sign of contagion in the US muni market.

FORBES: Behind Those Scary Municipal Bond Headlines

In color theory, black, although powerful, lends us a sign of uneasy authority holding the power with a mighty roar and seldom arouses an infuriated response.

FORBES: The Capitalist Touch: YSL Black -The Equilibrium Of The Universe

But the statement is a sign of growing concern in the US that the conflict in Syria is morphing into a complex regional war by proxy.

BBC: Hezbollah fighters 'invading' Syria - rebel chief