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illicit drugs
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国际禁毒公约和有关法律法规规定管制的能够使人形成瘾癖的麻醉药品和精神药物的统称。又称具有依赖特性的药物、违禁药物或国际管制的麻醉药品和精神药物。有时被统称为“精神活性药物”。
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backpitch
backplan
back plane
backplane
back pressure heat and power cogeneration
back pressure test for gas well
back pressure turbine
backproject
backprojection operator
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back propagation algorithm
back-propagation algorithm
back propagation network
back propagation neural network
back-propagation neural network
back propagation of errors network
back propagation,BP
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back reflective material
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backscatter cross-section
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