何事にせよ成し遂げようと思うなら、人は常に自らの考えに多忙でなくてはならない。 - アントニ・ファン［アントニー・ヴァン］・レーウェンフック (1632 - 1723)
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A man has always to be busy with his thoughts if anything is to be accomplished. - Antonie [Anton/Antoni/Antony] van Leeuwenhoek (1632 - 1723)
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