The pivot row must be selected so that all the other basic variables remain positive.
必须选择枢轴行，以便所有其他基本变量保持正数。
But that same thing can be looked at in a more positive way.
但是，同样的事情，可以用更积极的方式来看待。
With every positive mental picture, it reinforced that my goals could be a reality.
那一幅幅想像出来的积极画面，增强了我能将目标变为现实的信心。
A positive scenario starts with the fact that things could be much worse.
积极的场景是以很多事情可能更加糟糕这一事实开场。
Also, the possibility that there might be some positive interaction effects.
同样也有产生正面互相影响的可能性。
That would hardly be positive for stock markets.
这对股票市场来说，很难确定。
And with an attitude like that, it's hard to be anything but positive.
用这样的态度，很难不积极起来。
I am grateful that I can be a positive influence in the lives of others.
我感激我能对别人的生活产生积极的影响。
I think that would be very positive so that everyone can hear what we have to say.
我认为，这将是非常积极的，因为所有的人都能听到我们所要说的东西。
Learn To Be positive: Research has shown that people who are more positive experience less stress.
研究已经表明，比较乐观的人压力较少。
Will that chapter be on the positive or the negative side of the ledger?
这章节会是在总帐册的正面或负面那一边呢？
However, you should keep in mind that the effect made by this approach cannot always be positive.
不过，你应该记住，我们的影响所作的这种做法是不可能永远是正面的。
That change can be either positive or negative.
这种转变可以是积极的或消极的。
It is only in the negative state that love can be, not in the positive state.
只有在这种否定的状态里爱才存在，不是在肯定的状态。
These are general ideas about a nationality that can be positive or negative!
这些关于国籍的大体概念可以是积极的，也可以是消极的！
Think of the most positive thing you'll be doing that day.
想一想你将在这一天做的最积极的活动。
If you have 100% positive feedback, be sure to write that on every auction too.
如果你有100%的正反馈，请务必写在每个拍卖了。
And that will be positive for both the economy and the stock market, he concludes.
这将会是积极为双方的经济及股票市场，他说。
But while that can be very useful it can also detract from positive things.
可是，虽然分析很有用，但是它还会剥夺积极东西。
Research shows that employees' positive attitudes can be good for business, too.
研究表明，积极的心态的员工也可以是有益的工作性能。
Try and be positive. Your life isn't that bad.
努力乐观一点。你的人生才没那么糟呢。
Studies have shown that singing and dancing can be an instant, positive mood booster.
研究表明唱歌和跳舞能够马上促进积极的心情。
There must be much more positive action than that.
必然有比那更积极的行动。
They also say that a positive or negative attitude can be contagious.
也有人说积极和消极的态度能够感染。
Write down at least one positive thing about each day and you will see that it's not difficult to be positive.
至少写下每天的一件积极的事情，你会发现积极并不是很困难。
It appears that the positive value of loss can only be given as gain.
这种消耗甚至无法被理解。似乎，损失的正面价值，只能被给予当著述获得。
It appears that the positive value of loss can only be given as gain.
这种消耗甚至无法被理解。似乎，损失的正面价值，只能被给予当著述获得。
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