[Expired]Penn Championship Extra Duty Tennis Balls

: Feels like AI-generated images 感觉AI制图

: The main difference lies in the material and performance of the balls. Extra Duty balls feature a thicker and fluffier felt, which makes them more durable and slows down the ball speed. They're ideal for environments where slower ball speeds are needed. Regular Duty balls have a thinner, more tightly woven felt. On softer court surfaces, the felt doesn’t wear down as quickly and can actually become fluffier, increasing the ball speed, so they're better suited for faster-paced environments. 主要是球的材质和性能，Extra毛毡更厚、‌更蓬松，‌使得球具有更强的耐打性，‌并且能够降低球速，适合更需要慢球速的环境。Regular毛毡更薄更紧密，球在较软的场地类型上时，‌毛毡并不会被磨损，‌反而会变得更加蓬松，增加球速，适合快球速环境

: I also stared at it for a while, still wondering how you'd drink from something that's all furry on the outside 我也看了半天还在想外面都是毛怎么喝

回复 @苏小乙 : Hahahahaha, I also thought it was a cup 哈哈哈哈哈，我也以为是杯子