If one is going to be optimistic about the future of malaria, one might also, with caution, be optimistic about the future of assessments of climate change.

如果一个人将对未来的疟疾持乐观态度，他(她)也可能乐观审慎地面对未来气候变化的评估。

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However, if our continuing abuse of resources continues at this rate unchecked, we can be anything but optimistic about our species' future.

但是，如果我们以这种失控的速度继续滥用资源，我们就绝不能再对我们人类的未来持乐观态度。

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Be optimistic about your company and focus on steps you can take to have a positive impact on its future.

和他人分享工作的成功。对公司有信心才能对自己美好的未来有积极的影响。

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All of these are grounds to be optimistic about the future of the universities.

ECONOMIST: A cardinal in cyberspace

In a brief email to the BBC, Mr Luo did not appear to be optimistic about the future.

BBC: How a Chinese journalist took on a top official

"All those reports pointed out there was good reason to be optimistic about the future and their faith is being borne out by the improvement in our performance, " he said.

BBC: The service is on track to beat its response targets for May