女性太空人威廉斯30日在国际太空站外工作 。（美联社） 被困在国际太空站(International Space Station)八个月的两名太空人，30日首次结伴出舱进行太空漫步，拆除破损的天线，顺便采得太空站外的灰尘样本，检验是否含有微生物。

Scientists researching Alpine glaciers store ice in Antarctica. By analysing air bubbles in the ice they may be able to predict the future ...

ISLAMABAD, Feb 1 (China Economic Net) - From January 19 to 24, a high-level delegation from Ningbo University, led by Academician Zhao Yufen, Member of the Chinese Academy of Sciences and Director of ...