“Shenzhou 7 is an incremental but important step forward,” said Joan Johnson-Freese, an expert on the Chinese space program at the U.S. Naval War College in Rhode Island.

来自罗德艾兰州的一位研究中国空间项目的专家，美国海军学院的Joan Johnson-Freese先生说：“神七标志着中国在空间领域的一个非常重要的跨越式进步。”

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But even if Washington offers to work with Beijing, Johnson-Freese says China might not accept the invitation.

VOA: standard.2010.04.21

Joan Johnson-Freese of the Naval War College says there are national security reasons to rethink that policy.

VOA: standard.2010.04.21

Joan Johnson-Freese of the U.S.Naval War College in Rhode Island says that even without a manned Moon mission, the U.S.still will be the biggest player in space.

VOA: standard.2010.04.21