There are positive changes that should be implemented in the rearing of animals.

应该积极改变动物的饲养方式。

《柯林斯英汉双解大词典》

Some of the statistical generalizations may be positive as some groups have reputations for being smart, for being loyal, for being brave, for all sorts of things that are not at all negative.

一些统计概括可能很正面，如某些群体以聪明闻名、或以忠诚闻名、或以勇敢闻名、或以其他各种积极的品质闻名。

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If the test is positive, a course of antibiotics may be prescribed.

如果化验结果呈阳性，可能要开一个疗程的抗生素。

《柯林斯英汉双解大词典》

"We can be proud of the positive contribution that our servicemen and women are making, in conjunction with our allies,".

VOA: standard.2009.12.25

It's going to be positive in terms of its wave function or in terms of its phase anywhere where y is positive.

只要ｙ大于零它的波函数,或者说是相位为正。

麻省理工公开课 - 化学原理课程节选

And in terms of thinking about the phase of this p orbital, the phase is going to be positive anywhere where z is positive.

对于ｐ轨道的相位，在ｚ大于零的地方都是正的。

麻省理工公开课 - 化学原理课程节选

No guarantees, but the winter months tend to be positive regardless of surrounding conditions.

FORBES: Time Of The Season To Be Bullish

Not all usage will be positive, of course, but I think that brands now understand that irony and even rude humor can be powerful forces in the viral spreading of videos and will likely accept the loss of total control in exchange for the potential upside.

FORBES: Tellagami Makes Fast, Fun User Generated Video Content For The Mobile Generation

It highlighted four of the 10 notable developments that the Keeping Pace report spotlighted, two of which I found to be quite positive and two of which that may appear to be good on the surface but I believe represent some cause for concern.

FORBES: Notable online learning developments in 2010 not all positive ones