Русско-английский научно-технический словарь
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• Although large-gap semiconductors are colourless when they are pure, they can take on colour when they are "doped" with traces of an impurity.
Русско-английский научно-технический словарь
• Although large-gap semiconductors are colourless when they are pure, they can take on colour when they are "doped" with traces of an impurity.