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<!DOCTYPE html> <html> <body> <h2>JavaScript 函数</h2> <p>访问不带 () 的函数将返回函数定义而不是函数结果：</p> <p id="demo"></p> <script> function toCelsius(f) { return (5/9) * (f-32); } document.getElementById("demo").innerHTML = toCelsius; </script> </body> </html>