"Launching radioactive material through the Earth's atmosphere brings safety concerns. You have to have a special license to do that, but it is not insurmountable," says Dr Simeon Barber, planetary science specialist at the Open University.
A PacBio RSII machine, ca. 2013. Credit: Konrad Förstner
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— Strunk and White’s Elements of Style
这个赛道在投资界的发展历程，可以说是从狂热追捧到回归理性的典型代表。
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