一个 2.7 亿的模型可能会产生虚假的参数值。如果没有约束，请求“把它变成红色”可能会生成 {“color”: “crimson”} 或 {“color”: “rouge”}。枚举类型强制模型仅从有效值中选择，从而确保函数调用的可靠性。
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9. WhatFont: Chrome Extension for identifying Any Site FontsWhatFont is a Chrome extension that allows web designers to easily identify and compare different fonts on a page. The first time you use it on any page, WhatFont will copy the selected page.It Uses this page to find out what fonts are present and generate an image that shows all those fonts in different sizes. Besides the apparent websites like Google or Amazon, you'll conjointly use it on sites wherever embedded fonts ar used.，更多细节参见91视频
Jim Lovell had been to the Moon twice, witnessed Earthrise and narrowly avoided a cold death in space - and saw no reason to falsely burnish his résumé.