Translation is the communication of the meaning of a source-language text by means of an equivalent target-language text. The English language draws a terminological distinction (not all languages do) between translating (a written text) and interpreting (oral or sign-language communication between users of different languages); under this distinction, translation can begin only after the appearance of writing within a language community.
Aviation is becoming more environmentally friendly with a new software tool that helps improve aircraft performance during every life-cycle stage, from construction to end-of-life through operation.
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