This is clipart converted and broken apart that has been released into the public domain because the document says so, and its from NASA, a USA government agency. The publication is called "The Brain in Space:" http://www.nasa.gov/audience/foreducators/topnav/materials/listbytype/The.Brain.in.Space.html 天文學 腦 轉換 58294main_The.Brain.in.Space-頁面-79-手錶
VECTOR ILLUSTRATION OF A SMARTWATCH. IMAGE OF A WRISTWATCH WITH TOUCHSCREEN smartwatch 腕表 時鐘 SMARTWATCH VECTOR IMAGE.ai
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