This is not proof-positive that Google is developing a microblogging search engine.

谷歌正在开发微博客搜索引擎这一说法的证据并不确凿。

This is not proof-positive that Google is developing a microblogging search engine, but it makes sense that they would.

这并不能确切证明Google正在开发微博客搜索引擎，但它表示他们会。

This is proof positive that he stole the money.

这就是他偷钱的肯定证据。

While there is much research to prove that time in or near nature has a positive impact on mood, I am sure that you don't need proof.

有很多研究可以证明与自然共度的时光可以对人的情绪产生积极的作用，我可以肯定对于这一点你不需要更多的证据了。

Each is tangible proof of literacy's profound and positive influence on women living in very different circumstances -from rural environments to immigrant urban communities.

每一个方案都实实在在地证明了识字对生活环境迥异(从乡村环境到移民城市社区)的妇女产生的深远而积极的影响。