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An operational definition is designed to model or represent a concept or theoretical definition, also known as a construct.Scientists should describe the operations (procedures, actions, or processes) that define the concept with enough specificity such that other investigators can replicate their research.
道路交通标志和标线 第2部分：道路交通标志 GB 5768.2-2022.pdf: Author: 121: Software used: pdfFactory Pro www.fineprint.cn: Conversion program: pdfFactory Pro 4.50 (Windows 7 Ultimate x64 Chinese (Simplified)) Encrypted: no: Page size: 595 x 842 pts (A4) Version of PDF format: 1.4
The 2022 New York City Marathon, the 51st running of that city's premier long-distance race, was held on November 6, 2022. The race followed its traditional route, which passes through all five boroughs of New York City. 47,839 people finished the event. It was the warmest New York City Marathon on record, with peak temperatures of 75 °F (24 °C).