Where there is an open mind there will always be a frontier.
哪里有开放的思想，哪里就有前沿。
-- Charles F. Kettering 查尔斯·凯特林
Where there is an open mind there will always be a frontier.
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Where there is an open mind there will always be a frontier.
哪里有开放的思想，哪里就有前沿。
-- Charles F. Kettering 查尔斯·凯特林
