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Petite pensé. En anglais, il existe le verbe "to rotate", en français son équivalent serait le verbe rotationner, sa dénition serait eectuer ou faire eectuer une rotation. Cependant le verbe "rotationner" n'existe pas dans la langue française. Et pourtant, il tourne. The discrete geometry is to classical geometry what the language is to thought, i.e. an(More)
The development of the nervous system can be studied only if the age of the embryo is exactly known. Since it is difficult to control reproduction in female cats, we tried to time fertilization very precisely to within one hour by using either artificial insemination, or by mating females in oestrus induced by light programming. In one trial, this(More)
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