The US space agency is scheduled to retire its space shuttles next year, and has begun the development of a new human space launch "architecture" called Constellation.

美国航天局计划在明年让航天飞机退役，现在他们已经开始开发一种新的被称作星座的载人太空发射装置。

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However, what science told us back in 1984 was that human females certainly could never have a natural virgin birth, because of a genetic barrier in mammals called imprinting.

然而1984年时候的科学去告诉我们，由于哺乳动物中存在被称作印记的基因障碍，所以说女性是绝不可能进行处子生育的。

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A human being is a part of a whole, called by us' universe ', a part limited in time and space.

一个人，是被我们称为“宇宙”的整体的一部分，存在于有限的时间和空间中。

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"The company's human resources director called us in a panic, " recalls Christine Fahlund, a senior financial planner at T.

FORBES: Company Stock Bonanza

The brain imaging technology is being developed for a US-led effort to map the human brain called the Human Connectome Project.

BBC: Scans reveal intricate brain wiring

There is no law against private stem cell research in the US, but Mr Bush has called for an international United Nations ban on all human cloning, prompting ire from a number of countries which allow the process under regulated conditions for research purposes.

BBC: NEWS | Americas | Q&A: The politics of stem cells