Just as the only reservoir for the typhus virus in nature is provided by man, so the only vector of infection is the louse. The bite of the louse is not virulent immediately after the infecting meal. It becomes so only towards the 7th day following infection.
Charles Jules Henry Nicole
The necessity to conceptualise has to come very early on, and defining a vector of development for that film also at the beginning of the process will allow you much more freedom as you go along.
Walter Salles
The radius vector describes equal areas in equal times.
Johannes Kepler
We're on the same radius from the Earth, and then we start to swing around to where we're ahead of them on the velocity vector, so we come in relative to the station from this forward velocity position and dock on to the forward end of the Lab.
Linda M. Godwin
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