TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

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Every few years we have what are known as "irruption" years. These are years when finches and other species that generally winter in the boreal forest in Canada and the far north, move south to the joy and amazement of bird enthusiasts.... An irruption occurs when large numbers of birds move beyond their typical range, usually in response to low food supplies.  1, fiche 1, Anglais, - irruption%20year

Fiche 1,  Justifications,  Français

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Les années d'irruption, lorsque les populations de lemmings s'effondrent dans l'Arctique, poussent des milliers de harfangs vers le sud du Canada et le nord des États-Unis, offrant des opportunités d'observation inhabituelles jusqu'au Québec et au Minnesota.  1, fiche 1, Français, - ann%C3%A9e%20d%27irruption

Fiche 1,  Justifications,  Espagnol

Fiche 2,  Justifications,  Anglais

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A large, relatively dust-free, spherical region surrounding a spiral galaxy, such as our own [Milky Way].  3, fiche 2, Anglais, - galactic%20halo

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The inner, visible part of the halo, which has roughly the same diameter as the galactic disk, is occupied by Population II objects, including globular clusters and old, individual stars. Beyond this is a much larger region, called the dark halo or extended halo, containing large amounts of dark matter, the presence of which is revealed by its gravitational effect on the galaxy's rotation. The nature of galactic dark matter is still undetermined but the most popular theory, supported by some recent observations, is that the dark halo is home to vast numbers of small, unseen bodies known as MACHOs.  3, fiche 2, Anglais, - galactic%20halo

Fiche 2,  Justifications,  Français

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Le halo galactique est une région de l'espace entourant les galaxies spirales, et notamment notre Galaxie, la Voie lactée. On pense que le halo galactique est principalement constitué d'étoiles, de gaz et de matière noire. Dans une galaxie elliptique, il n'y a pas de transition nette entre le corps de la galaxie et le halo.  2, fiche 2, Français, - halo%20galactique

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Fiche 3,  Justifications,  Anglais

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To control rabies in free-ranging animals, health officials in the 1950s had depended on thinning populations that harbored the offending virus. They tried gassing of dens, poisoning, trapping and shooting, among other tactics... Biologists reviewing some 10 years of experience with population-reduction programs for foxes, skunks and raccoons concluded that to improve the success rate, enormous numbers of animals would have to be killed. Because the species reproduce prolifically, destruction of more than 60 percent of a population would often be required to ensure that eradication of rabies persisted beyond one reproductive cycle...  1, fiche 3, Anglais, - population%2Dreduction%20program

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Fiche 3,  Justifications,  Espagnol

Fiche 4,  Justifications,  Anglais

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Knowledge-based systems will acquire ever larger numbers of rules and become self-feeding... Artificial intelligence systems may become very difficult to debug. Self-feeding knowledge bases may constitute a chain reaction that quickly passes beyond our ability to maintain accuracy controls. A problem for the future.  1, fiche 4, Anglais, - self%2Dfeeding%20knowledge%20base

Fiche 4,  Justifications,  Français

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en biologie on parle d'organismes "autotrophes" et en télécommunications de "auto-alimentation".  1, fiche 4, Français, - base%20de%20connaissance%20autodidacte

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autodidacte : qui s'est instruit lui-même, sans maître.  2, fiche 4, Français, - base%20de%20connaissance%20autodidacte

Fiche 4,  Justifications,  Espagnol